... question 8 please thanks../.... 5.1Questions1. A 25.0 N applied force acts on a cart in the direction of themotion. The cart moves 13.0 m. How much work is done bythe applied force? ™2. A tow truck pulls a car from rest onto a level road. The towtruck exerts a horizontal force of 1500 N on the car. Thefrictional force on the car is 810 N. Calculate the work doneby each of the following forces on the car as the car movesforward 12 m: ™(a) the force of the tow truck on the car(b) the force of friction(c) the normal force(d) the force of gravity3. A child pulls a wagon by the handle along a flat sidewalk.She exerts a force of 80.0 N at an angle of 30.0° abovethe horizontal while she moves the wagon 12 m forward.The force of friction on the wagon is 34 N. ™(a) Calculate the mechanical work done by the child onthe wagon.(b) Calculate the total work done on the wagon.4. A horizontal rope is used to pull a box forward acrossa rough floor doing 250 J of work over a horizontaldisplacement of 12 m at a constant velocity. ™ C(a) Draw an FBD of the box.(b) Calculate the tension in the rope.(c) Calculate the force of friction and the work done by theforce of friction. Explain your reasoning.5. A 62 kg person in an elevator is moving up at a constantspeed of 4.0 m/s for 5.0 s. ™(a) Draw an FBD of the person in the elevator.(b) Calculate the work done by the normal force on the person.(c) Calculate the work done by the force of gravity on theperson.(d) How would your answers change if the elevator weremoving down at 4.0 m/s for 5.0 s?6. A force sensor pulls a cart horizontally from rest.The position of the cart is recorded by a motion sensor.The data were plotted on a graph as shown in Figure 10.The applied force and the displacement are parallel. Whatis the work done on the cart by the force sensor after adisplacement of 0.5 m?™F(N)42-00Figure 100.1 0.20.3-0.4 0.5d (m)7. A rope pulls a 2.0 kg bucket straight up, accelerating itfrom rest at 2.2 m/s² for 3.0 s. ™(a) Calculate the displacement of the bucket.(b) Calculate the work done by each force acting on thebucket.(c) Calculate the total mechanical work done on thebucket.(d) Calculate the net force acting on the bucket and thework done by the net force. Compare your answerto the total mechanical work done on the bucket ascalculated in (c).8. In your own words, explain if mechanical work is done ineach of the following cases: K(a) A heavy box sits on a rough horizontal counter in afactory.(b) An employee pulls on the box with a horizontal forceand nothing happens.(c) The same employee goes behind the box and pusheseven harder, and the box begins to move. After a fewseconds, the box slides onto frictionless rollers andthe employee lets go, allowing the box to move with aconstant velocity.9. The graph in Figure 11 shows the force acting on acart from a spring. The force from the spring is either inthe same direction as the cart's displacement or in theopposite direction. GF(N)50-5-12B3Cd (m)Figure 11(a) Calculate the work done in sections A, B, and C.(b) Calculate the total work done.(c) Explain why the work done in section C must benegative.10. Describe two ways to determine the total work done by oneobject on another object. Ku11. Consider the equation W = F (cos 0)Ad. Ku(a) Using the equation, explain why a force perpendicularto the displacement does zero work.(b) Using the equation, explain why a force opposite to thedisplacement does negative work.

Name: ... question 8 please thanks../.... 5.1Questions1. A 25.0 N applied fo
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Description: ... question 8 please thanks../.... 5.1Questions1. A 25.0 N applied force acts on a cart in the direction of themotion. The cart moves 13.0 m. How much work is done bythe applied force? ™2. A tow truck pulls a car from rest onto a level road. The tow

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8. In your own words, explain if mechanical work is done in each of the following cases: (a) A heavy box sits on a rough horizontal counter in a factory. (b) An employee pulls on the box with a horizontal force and nothing happens. (c) The same employee goes behind the box and pushes even harder, and the box begins to move. After a few seconds, the box slides onto frictionless rollers and the employee lets go, allowing the box to move with a constant velocity.