Thrust - The forward thrust from the engine counteracts the forces of drag. The more drag that acts on the car, the harder the engine has to work to speed the vehicle up. Rolling resistance - Rolling resistance is the force acting against the tyres as they turn This physics tutorial explores how the forces acting on a car affect its motion.Subscribe for more physics tutorials: http://bit.ly/Subscribe-Physics-NinjaVi.. Let's say the car is moving at a constant speed. Then the sum of forces working on it is zero. * [math]F_\text{gravity}[/math] is the force from the Earth, pulling the car down to the ground. * [math]F_\text{ground}[/math] is the force from the gr.. A moving vehicle would have four main forces acting on it. Obviously there is the force of gravity that the Earth exerts on it, and then the normal force the ground exerts on the car to keep it up, which cancel. Then the movement forces are a forc..

Also, i am quite confuse in the direction of friction acting on the car wheels. Say, the car is front wheel driven by engine, i heard people saying the friction force is the same direction as the car's forward motion on the front wheel (driven by engine), while is in the opposite direction with the car's forward motion on the back wheel (non driven wheel). is this true? if it is, can you. DRAG COEFFICIENT FORCE: Any object moving through a fluid experiences drag - the net force in the direction of flow due to pressure and shear stress forces on the surface of the object. The drag force can be expressed as: F d = c d 1/2 ρ v 2 A . where. F d = drag force (N) c d = drag coefficien All of the forces acting on moving car are balanced when the car is _____. answer choices . slowing down. accelerating. moving at a constant speed. all of the above. Tags: Question 22 . SURVEY . 300 seconds . Q. In order to be _____ forces, their effects must cancel each other out and not cause change in an object's motion ** There might be a number of diﬀerent forces acting on a given object, and the total force (or net force) isgiven by the car would be moving in vertical direction**. More on this coming in the next section.) By plugging (4.17)and(4.18)intosecondlawalongx-axis (4.11)weget a = F x m = −7.20m/s2. (4.19

- support, gravity, thrust (from the engine), friction (from the road) and drag (from the air) however drag and friction are often thought of to be the same thing. whether you include both or one is..
- speed on the frictional surface. During this activity students identify, measure and calculate forces that act on a moving object, i.e., weight, normal force, force of friction, force generated by the motor, tension in the string. Students use scales to measure the weight and the pulling force of the car and calculate the other forces using.
- What is the net force acting on the box? A. 10N to the right B. 10N to the left C. 2N to the right D. 2N to the left 6. A 1500kg car increases its speed by 2m/s for each second of travel. What is the net force acting on the car? A. 750N B. 1500N C. 3000N D. 6000N 7. The forces acting on a skateboarder moving at a constant velocity along a.

For example, when a car travels at a constant speed, the driving force from the engine is balanced by resistive forces such as air resistance. and friction in the car's moving parts. The resultant. Why does the center of mass of car- Earth system changes with the car moving while no external forces acting? 0. What are the forces acting on this car? 1. Force acting on a body placed on accelerating inclined plane. 0. Friction acting between road and tyres of a car. Hot Network Question Note that the brakes apply a translational force, and since the force of friction acts in an opposing direction at the point of contact between the tire and ground, the force of friction is what causes the rotational motion of the wheels. When the car is accelerating, the forces due to the brakes are replaced with the engine's applied force, i.

4. (@) Which are the three forces that are acting on the car moving on a level road? (0) (b) Show tbat the maximum possible speed of a car on a banked road is greater than that on a flat road (c) A circular race track of radius 300 m is banked at an angle of 15°. If the coefficient of friction between the wheels on a race car and the road is 0.2 For simplicity, we assume a car is moving along a flat road at a constant speed and not steering. Other forces do come in to play, when this isn't the case, and if it weren't the case you would need to say so. There is no static friction acting opposite the car's velocity. In fact the net static friction force is acting in the car's FORWARD. Play this game to review Laws of Motion. A student claims that unbalanced forces acting on an object in motion can cause all of the following results: • The object could stop moving • The object could speed up • The object could change directions The best evaluation of this student's claims is that PREPARE: There are two forces acting on the car, the upward tension in the rope and the downward force of gravity. A free-body diagram for the car is shown A force is acting on each of the objects below. D. Gravity is pulling to crash test dummy in the direction the car is moving. B. The car is moving forward faster than the crash test dummy. A car reaches 80 km/h, then suddenly crashes into the concrete wall. Without a seatbelt, The crash test dummy slams into the car's dashboard because ____

Thus, a force can make a stationary object move, and it can also make an already moving object move faster. Force can slow down or completely stop a moving object A moving toy car can be made to stop by applying a force. A bicycle can be stopped or slowed down by applying the brakes. In football, the force applied by the goalkeeper stops the. 3. Slope of the road: if the car is going uphill, the gravity pulling on the car decreases the velocity of the car. If the car is going downhill then gravity pulling on the car increases the velocity of the car. 4. Friction between the outside of the car and the air. (decreases) Those are the ones I can think of off the top of my head. S Moving at a constant speed if your in the car then there are no forces acting on you from the car. If the car accelerates then the car will push you forward and you will feel the Force of the seat.

- If the forces on an object are balanced (or if there are no forces acting on it), this is what happens: a stationary object stays still; a moving object continues to move at the same speed and in.
- b. If the train is moving at constant speed, the engine's pull on the first car must exceedtd that car's backward pull on the engine. FALSE. The pull forward does not need to exceed the force pulling backward. It must only balance with the force, to produce a net force of zero and an acceleration of zero. c
- The Forces Acting On A Car. Newton's second law claims that the total external force acting on an extended rigid body equals the product of its mass and the acceleration of its center of mass

For the full DVD and further information on this title, please go to: http://pumpkin-interactive.co.uk/collections/science-and-psychology/products/forces-and.. Question 9 4 pts If a car is moving at a constant speed down a straight stretch of highway, what can you say about the net force acting on the car? The net force is in the same direction that the car is moving in The net force is opposite the direction that the car is moving in The net force is zero The net force is equal to the weight of the car **The** driving **force** comes from the engine and this moves it forward. The weight is created by the **force** of gravity **acting** **on** **the** mass of the vehicle, holding it to the ground. **Acting** in the opposite direction to the weight is the reaction **force**. There are two **forces** **acting** in opposition to the driving **force**, **the** friction with the road and the air.

Here is a picture of a car that is moving - it has 4 forces acting on it. They all cancel each other out. 7. What will the car do? A. Speed u Figure \(\PageIndex{1}\): Different forces exerted on the same mass produce different accelerations. (a) Two students push a stalled car. All external forces acting on the car are shown. (b) The forces acting on the car are transferred to a coordinate plane (free-body diagram) for simpler analysis The forces acting on this car are balanced. Car moving forward at 20 m/s The thrust from the engine is equal and opposite to the drag caused by air resistance and friction between the road and car.

- The four forces are lift, thrust, drag, and weight. As a Frisbee flies through the air, lift holds it up. You gave the Frisbee thrust with your arm. Drag from the air made the Frisbee slow down
- In Fig. 4.2a, for example, the interaction forces are exerted by the people push- ing the car. In Fig. 4.2b, the interaction forces include the force of air on the plane, the engine force from the hot exhaust gases, and Earth's gravitational force. We now explore in more detail the relation between force and change in motion
- The friction force acting upon the turned wheels of the car causes an unbalanced force upon the car and a subsequent acceleration. The unbalanced force and the acceleration are both directed towards the center of the circle about which the car is turning. Your body however is in motion and tends to stay in motion
- Newton's Notes 4 Problems: 1. What is the weight of an object (in Newtons) which has a mass of 45.8 kg? 2. What force must I exert to lift the above object off the ground? 3. A car with a mass of 1200 kg has an engine that can deliver a constant force of 25,000N. What would be the acceleration of the car? 4

Since forces acting on an object may act in opposite directions, ΣF is also called the net force. The formula ΣF = Ma is called the Newton's 2nd Law of Motion. For example, a car moving along a straight and horizontal highway, experiences an engine force F e, while being opposed by an overall frictional force, F f ( road friction as well as. * A force is acting on each of the objects below*. D. Gravity is pulling to crash test dummy in the direction the

If the direction of the acting force is perpendicular to the direction of motion, The velocity of the moving object remains unchanged , the direction of motion changes. Example: When the motorcyclist leans his body to right or to left , a force is produced normal to the direction of motion causing a change in the direction of motion so that the motorbike moves in a circular path There are three (perhaps four) forces acting upon this car. There is the upward force (normal force) and the downward force (gravity); these two forces balance each other since there is no vertical acceleration. The resistive force is likely a combination of friction and air resistance. These forces act leftward upon a rightward skidding car Force: Colliding With a Car . In a situation where car B collides with car C, we have different force considerations. Assuming that car B and car C are complete mirrors of each other (again, this is a highly idealized situation), they would collide with each other going at precisely the same speed but in opposite directions. From conservation of momentum, we know that they must both come to rest

Which graph best matches the motion of a car? A. A B. B C. C D. D 5. A force acting on an object that is free to move will cause a change in the speed of the object. The car is moving through an obstacle course. page 5 Motion and Forces Review. 10. The graph below relates velocity to time This sheet explores the forces acting on a car as it accelerates. Students complete force diagrams and answer questions. Tes classic free licence. Reviews. 4.5. TES Resource Team. 7 years ago. report. 5. Thank you for sharing your resource. This resource has been recommended by the TES Resource Team for its relevance to the 2014 National. long ranger force) and the normal force exerted by the table (a contact force). There are two forces acting on the book, but it is not moving because the net force on the book is zero. Assess: The net force, which is the vector sum of the forces acting on an object, governs the acceleration of objects through Equation 4.4. Q4.3. Reason: Newton.

To measure the forces exerted on the dummy during the impact. To measure the distance the car travels during the impact. (1) (Total 7 marks) Q11. (a) A car is being driven along a straight road. The diagrams, A, B and C, show the horizontal forces acting on the moving car at three different points along the road A sailboat is floating across a lake. Four forces act on the boat: its weight, the buoyant force (the contact force with the water that pushes the boat up), the forward force of the wind, and the. (a) Two students push a stalled car. All external forces acting on the car are shown. (b) The forces acting on the car are transferred to a coordinate plane (free-body diagram) for simpler analysis. (c) The tow truck can produce greater external force on the same mass, and thus greater acceleration * normal force (acting in the opposite direction of gravity) gravitational force (acting towards the center of the earth) force due to acceleration (acting in the direction of motion, to completely cancel out the frictional forces, but no more, since the car is going at a uniform speed) PS*. Kinetic energy is not a force

- All Four Forces Act on an Airplane. When an airplane is flying straight and level at a constant speed, the lift it produces balances its weight, and the thrust it produces balances its drag. However, this balance of forces changes as the airplane rises and descends, as it speeds up and slows down, and as it turns
- A. The force of gravity acting on the car increases. B. The force of gravity acting on the car decreases. C. The forces in uencing the car are not balanced. D. The forces in uencing the car are balanced. 32. A force is any push or pull exerted on matter. An arrow (!) is the standard symbol used to diagram a force
- The diagram shows the horizontal forces acting on a car travelling along a straight road. (a) Complete the following sentences by drawing a ring around the correct word in each box. (i) When the driving force equals the drag force, the speed ofthe car is decreasing constant increasing (1
- Mechanics Lecture 4, Slide 12 Checkpoint You are driving a car with constant speed around a horizontal circular track. The net force acting on your car A) Points radially inward toward the center of the circular track B) Points radially outward, away from the center of the circular track C) Points forward in the same direction your car is moving
- 40. On the diagram below, draw and label all vertical forces acting on the crate. 41. On the diagram below, draw and label all horizontal forces acting on the crate. 42. A 60-kilogram skydiver is falling at a constant speed near the surface of Earth. The magnitude of the force of air friction acting on the skydiver is approximately A. 0N B. 6N.

If the scale reads a value greater than the weight of the person at rest, the elevator car could be moving (A) downward at constant speed (B) upward at constant speed (C) downward at increasing speed (D) upward at increasing speed Compared to the inertia of a I -kilogram mass, the inertia of a 4-kilogram mass is (A) gravitation (B) action-reaction (C) acceleration (D) inertia Which two graphs represent the motion of an object on which the net force is zero A number of different forces act on a moving vehicle. (a) A car moving at a steady speed has a driving force of 3000 N. (i) What is the value of the resistive force acting on the car? Tick ( ) one box. Tick ( ) 2000 N 3000 N 4000 N (1) (ii) What causes most of the resistive force? Tick ( ) one box. Tick ( ) Air resistanc per second2 north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at A)moves at constant speed to the right B)moves at constant speed to the left C)accelerate to the right D)accelerate to the left 17.Four forces act concurrently on a block on

a) is correct. Fnet=ma. a force produces an acceleration, so a car moving at a constant velocity might as well be standing still. the constant velocity has no effect whatsoever on the forces applied, and vice versa. just because the car is in motion does not mean there is a net force. if the car was accelerating, e) would be right. balanced forces mean no change in velocity, i.e. no acceleration The drag coefficient of a car at the design conditions of 1 atm, 25°C, and 90 km/h is to be determined experimentally in a large wind tunnel in a full-scale test. The height and width of the car are 1.40 m and 1.65 m, respectively. If the horizontal force acting on the car is measured to be 300 N, determine the total drag coefficient of this car

horizontal forces acting on the moving car at three different points along the road. Describe the motion of the car at each of the points, A, B and C. (3) (b) €€€€The diagram below shows the stopping distance for a family car, in good condition, driven at 22 m/s on a dry road. The stopping distance has two parts * unbalanced force acting on it? A*. an apple in free fall B. a satellite orbiting Earth C. a hockey puck moving at constant velocity acrcoss ice D. a laboratory cart moving down a frictionless 30. incline 18. Four forces act concurrently on a block on a horizontal surface as shown in the diagram below. As a result of these forces, the bloc

A short train (an engine plus four cars) is accelerating at 1.10 m/s^2. The mass of each car is 38000 kg, and each car has negligible frictional forces acting on it. In solving this problem, note the importance of selecting the correct set of cars to isolate as your object. Part A. What is the force of the engine on the first car? Part B Lift and weight are two of the four forces acting on an airplane, the other two are drag and thrust (see Figure 1). when the car turns, a force must accelerate the car towards the center of the turn (see Figure 8). Similarly, as the fluid particle follows the cambered upper surface of the wing, there must be a force acting on that little.

- Q1. (a) The diagrams, A, B. and . C, show the horizontal forces acting on a . moving. car. Draw a line to link each diagram to the description of the car's motion at the moment when the forces act
- Force and Acceleration Medium (Grade C) Q1.The diagram shows the forces acting on a car. The car is being driven along a straight, level road at a constant speed of 12 m/s. (a) The driver then accelerates the car to 23 m/s in 4 seconds. Use the equation in the box to calculate the acceleration of the car
- Lab - Forces and Motion Objectives 1. To explore the forces acting on a body that rests on Earth surface. 2. To explore unbalance forces. 3. To understand the effect of the forces of friction during the motion of objects
- Four forces acting on an aircraft in straight-and-level, unaccelerated flight are thrust, drag, lift, and weight. How these forces work and knowing how to control them with the use of power and flight controls. Lift equation exemplifies this mathematically and supports that doubling of the airspeed will result in four times the lift. A limit to how far the AOA can be increased, if a stall is.

- A car is moving at a speed of 70 km/h in air at 20°C. The frontal area of the car is 2.4 m 2. If the drag force acting on the car in the flow direction is 205 N, the drag coefficient of the car is (a) 0.312 (b) 0.337 (c) 0.354 (d) 0.375 (e) 0.39
- Some interesting situations connected to Newton's second law occur when considering the effects of drag forces upon a moving object. For instance, consider a skydiver falling through air under the influence of gravity. The two forces acting on him are the force of gravity and the drag force (ignoring the small buoyant force)
- es the inertia of an object _B_ 5. type of force needed to overcome inertia of an object _A_ 6. Tendency of an object to resist a change.
- And if an additional external force is applied, the velocity changes because of the force. An aircraft in flight is a particularly good example of the first law of motion. There are four major forces acting on an aircraft; lift, weight, thrust, and drag

The forces acting on an object are represented by arrows coming out of the box — out of the center of the box. This means that in essence, every object is a point — a thing with no dimensions whatsoever. The box we initially drew is just a place to put a dot and the dot is just a place to start the arrows. Workers moving a subway car 4.The mass of a paper clip is approximately A) 1.3 × 10-3 m B)1.3 × 10-1 m C) 1.3 × 100 m D) 1.3 × 101 m 5.The approximate height of a 12-ounce can of root beer is A) 10-2 N B)100 N C) 102 N D) 104 N 6.The weight of an apple is closest to A)0.16 km/min B) 0.33 km/min C) 12 km/min D) 24 km/min 7.In a 4.0-kilometer race, a runner. steel surface, is acted on by a 2.4-newton friction force. The block will be brought to rest by the friction force in a distance of 10 meters. a) On the diagram of the block, draw an arrow to identify the direction of each force acting on the block while it is still moving, but is being slowed by the friction force. Identif Figure 9.2This motionless person is in static equilibrium. The forces acting on him add up to zero. Both forces are vertical in this case. Figure 9.3This car is in dynamic equilibrium because it is moving at constant velocity. There are horizontal and vertical forces, but the net external force in any direction is zero The normal force acting on the chandelier is 22 N [down]. Section 4.1 Questions, page 167 1. (a) According to Newton's second law, the net force acting on an object is given by the equation .! F net =m! a I ntheab s c of ir , ly force acting on a falling object is the force of gravity given by the equation F g =mg. For all objects, ma=mg a=

If the car is not rotating, then the sum of all moments acting about any point must be zero. A moment is simply a force acting on an object, in either the x- or y- direction, multipled by its distance from some point of reference. In the drawing above, suppose that the point of reference is at point b. The two moments acting on the car are The normal force and the force of friction acting on a moving car; The normal force and the tension in the rope on a tetherball; Teacher Support. Teacher Support. Use the Check Your Understanding questions to assess whether students master the learning objectives of this section. If students are struggling with a specific objective, the. Conceptual: Suppose the car is going around an unbanked (level) curve (as in the diagram on the previous page).The diagram at left shows a free-body diagram of the forces acting on the car.. The downward force labeled mg is the weight of the car (the Earth pulling downward on the car). The upward force, labeled N (for Normal) is the force the road exerts on the car perpendicular to the. A race car has a mass of 710 kg. It starts from rest and travels 40 meters in 3.0 seconds. That car is uniformly accelerated during the entire time. What net force is applied to it? 40 m 0 m s-1 ---? 3 s = +1 2 2 40=1 2 ()(3)2 =8.89m −2 = =(710)(8.89) =6311 FT = total forces acting on the car - rolling resistance force, gradient resistance force and aerodynamic drag resistance (N) v = velocity of the car (m/s) η = overall efficiency in the transmission, normally ranging 0.85 (low gear) - 0.9 (direct drive) For a car that accelerates the acceleration force must be added to the total force

There are four basic types of gears: spur gears, rack and pinion gears, bevel gears, and worm gears. Spur gears are probably the type of gear that most people picture when they hear the word. The two wheels are in the same plane (the axles are parallel) * In (b), the forces on the car are balanced, but the car is moving; we say that it is in dynamic equilibrium*. (We examine this idea in more detail in Static Equilibrium and Elasticity.) Again, it is possible for two (or more) forces to act on an object yet for the object to move. In addition, a net force of zero cannot produce acceleration Q1. The figure below shows overhead views of four situations in which forces act on a block that lies on a frictionless floor. If the force magnitudes are chosen properly, in which situation it is possible that the block is (a) stationary and (b) moving with constant velocity? ay≠0 a=0 ay≠0 a=0 Fnet Fnet Q5. In which situations does th

- Force of box on car going left force of friction going left. Arrow smaller then weight eg. Suppose that the car is moving to the right. Draw a free body diagram for the car described in the introduction. Free body diagram of a car. I knew that there had to be a weight force on the car acting downward so i drew it
- A car with a mass of 2000 kg drives with speed 60 km/h (16.7 m/s) before it crashes into a massive concrete wall. The front of the car impacts 0.5 m (the deformation distance). The impact force can be calculated as. F max = 1/2 (2000 kg) (16.7 m/s) 2 / (0.5 m) = 558 kN. Note that the gravitation force (weight) acting on the car is only. F w = m
- Bucklers Mead Community School 5 4. (a) The diagram below shows a moving tractor. The forward force from the engine exactly balances the resisting forces on the tractor

* Since forces acting on an object may act in opposite directions, ΣF is also called the net force*. The formula Σ F = Ma is called the Newton's 2nd Law of Motion . For example, a car moving along a straight and horizontal highway, experiences an engine force F e while being opposed by an overall frictional force, F f (road friction as well. Explain why the car is accelerating even though it is moving with a constant speed. Markscheme direction changing; velocity changing so accelerating; [2 marks] 12b. On the diagram, draw and label the vertical forces acting on the car in the position shown

a. the gravitational force acting on the car. b. the backward force the road exerts on the car. c. the upward force the road exerts on the car. d. the force exerted by a towing cable on the car. ____ 10. A free-body diagram of a ball in free fall in the presence of air resistance would show a. a downward arrow to represent the force of air. A 550-kg car increases its speed from 20m/s to 40m/s over a flat stretch of road 400m long. What is the average NET horizontal force on the car? • Want NET force - Find acceleration from kinematic variables • Given acceleration, find net force •a = 15. ms/ 2 F NET = 825N If drag forces on car are 340N, what is the magnitude of th (B) the car exerts a greater amount of force on the truck than the truck exerts on the car. (C) neither exerts a force on the other, the car gets smashed simply because it gets in the way of the truck. (D) the truck exerts a force on the car but the car doesn't exert a force on the truck. (E) the truck exerts the same amount of force on the car. (i) the driving force provided by the wheels, (a) Calculate the magnitude of the resultant force acting on the car. (use of F = ma gives) F = 1.3 X 103 x 2.5 - 3250N 103) A car accelerates at a steady rate of 2.5 ms along a straight, level road. The mass of the car is 1.3 X 103 kg Another force acting on the car is friction. Friction is when one object rubs against another. There is friction when the toy car is rolling down the ramp. Gravity is also a force because as the car is moving down the ramp, gravity is pulling it towards the ground. Lastly, air resistance is another force which is pulling the car to a stop

(a) four times as much. (b) twice. (c) the same amount as for half the work in half the time. 28. Whereas impulse involves the time that a force acts, work involves the (a) time and distance that a force acts. (b) distance that a force acts. (c) acceleration that a force produces. 29. An object that has kinetic energy must be (a) falling The car is accelerating in the direction shown. 4. In which direction does the frictional force act on the wheel? B 86. Dynamics 86 4. Three horizontal forces act on a car that is moving along a straight, level road. 87. Dynamics 87 1. Which combination of forces would result in the car moving at constant speed? C 88. Dynamics 88 5 3. What force, acting for 1.35 x 10-3 seconds, will change the velocity of a 95-gram baseball from 50.0 m/s eastward to 45.0 m/s westward? 4. A 10,000-kg freight car is rolling along a track at 3 m/s. Calculate the time needed for a force of 1000 N to stop the car. 1600 N -4 s 6.7 x 103 N 30 Chapter 5 378 Becauseax is independent of m and Fg, the critical accelerations are the same. 3 • A block of mass m rests on a plane that is inclined at an angle θ with the horizontal. It follows that the coefficient of static friction between the block and plane is (a) μs ≥ g, (b) μs = tan θ, (c) μs ≤ tan θ, (d) μs ≥ tan θ.Determine the Concept The forces

Physics 100A Homework 4 - Chapter 5. Newton's First Law . A)If a car is moving to the left with constant velocity then the net force applied to the car is zero. B) An object cannot remain at rest unless the net force acting on it is zero. C) An object has constant acceleration if the net force acting on it is constant. Understanding Newton's Laws . A)An object cannot remain at rest. Chapter 4 292 (b) Pulling a fish vertically upward at constant velocity while it is still in the water. The forces acting on the fish are the pull, the weight of the fish, and water drag forces. These forces add up to zero. (c) The three forces need to add vectorially to zero.An example is a picture hun also on other forces (e.g. friction) acting on you and the car. 4) Suppose two carts, one twice as massive as the other, are held together and joined by a compressed spring

4.As the mass of a body increases, its gravitational force of attraction on the Earth A) north B) west C) south D)east 5.A car moves with a constant speed in a clockwise direction around a circular path of radius r, as represented in the diagram above. When the car is in the position shown, its acceleration is directed toward the A)0.068 J B) 0. The applied forces of 800 N and 400 N will result in the car moving to the right. C. The forces acting on the car are equal in magnitude and the car will remain motionless A car of mass m starts moving so that its velocity varies according to the law v = β s , where β is a constant, and s is the distance covered. The total work performed by all the forces which are acting on the car during the first t seconds after the beginning of motion is shows four forces acting upon an object. There aren't always four forces. Problem 1 A car runs out of gas and is coasting down a hill. The car is coasting down the hill, there is Problem 1: How much force is needed to keep a 78Kg block moving at a constan *10 A 55-kg box is being pushed a distance of 7.0 m across the floor by a force whose magnitude is 150 N. The force is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on the box

An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.5 N; a second force has a magnitude of 4.4 N and points in the negative y direction. Find the direction and magnitude of the third force acting on the object. Solution force? (32N) 4. A 12.0kg object is accelerated by a net force of 10.2N east. What is the acceleration of the object? (0.850m/s2 east) 5. A 925kg car accelerates uniformly from rest to a velocity of 25.0m/s south in 10.0s. What is the net force acting on the car during this time? (2.31x103N south) 6 Diagram the forces acting upon the skydiver. 9. A force is applied to the right to drag a sled across loosely-packed snow with a rightward acceleration. Diagram the forces acting upon the sled. 10. A football is moving upwards towards its peak after having been booted by the punter. Diagram the forces acting upon the football as it rises upward. Object C 4.9 3 Object D 0.7 14 A diagram of the **forces** being applied to a box is provided (above). If the net **force** **acting** **on** **the** box is 10N toward the right, what is the magnitude of **force** applied by the boy pulling to the left? Record your answer in the grid below. Show all work! A student applies 2 Newtons of **force** to a toy **car** causing it t Now the total retarding force is. F Tot = 4 194 N + 125 N = 4 319 N. To keep the car moving at constant speed, the engine must supply this force to the tires. P = F v. v = P / F = 130 000 W / 4 319 N = 30.09 m / s. v = 30.1 m / s. On a 1-in-10 incline, the component of the weight that is parallel to the road i 2.1.4 Classification of forces: External forces, constraint forces and internal forces. When analyzing forces in a structure or machine, it is conventional to classify forces as external forces; constraint forces or internal forces. External forces arise from interaction between the system of interest and its surroundings. Examples of external forces include gravitational forces; lift or drag.