8.A dog team exerts a horizontal force to a sledge weighing 5000 Nincluding load. It is pulled on level snow with a coefficient of kineticfriction of 0.05. How much work is done by the dog team pulling thesledge 1000 m at constant speed?А. 2.5 х 10')В. 2.5 X 105 JС. 2.5 X 10° /D. 2.5 X 10' J9.A man pushes an 80-N crate up a frictionless slope that makes anangle of 30° with the horizontal. The man was able to push it to adistance of 5.0m along the slope with a force parallel also to theslope. However the speed of the crate decreases at a rate of 1.5 m/s?.The work being done by the man is:А. -200 JВ. 61 JC. 140 JD. 200 J

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Answered: 8. A dog team exerts a horizontal force…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Sara used a sling shot to hunt a bird. She stretched the rubber band 5cm when she applied 2 N force. How much elastic potential energy is stored in the sling shot ? A. 0.05 J B. 0.075 J C. 0.45 J D. 0.25 J
6. At the moment when a bodybuilder throws a 10.0kg medicine ball, it is exactly 2.0m above the ground and traveling at 5.0 m/s. It reaches a maximum height of 3.0m above the ground and then falls to the ground. Assume that air resistance is negligible. a. What is the potential energy of the ball as it leaves the hands relative to the ground? b. What is the kinetic energy of the ball as it leaves the hands? c. What is the total mechanical energy (kinetic plus potential) of the ball as it left the hands? 1.200 d. What is the total mechanical energy of the shot JUST as it reaches its maximum height? e. What is the potential energy of the shot just as it reaches its maximum height? f. What is the kinetic energy of the shot just as it reaches its maximum height?
Sienna is getting her books . To lift her books from a table , 50 J of work is done . How much power is required to lift the books in 0.5 s ? A.100 Watts B. 25 Watts C. 500 Watts D. 200 Watts
A horizontal force of 150 N is applied to push a 40.0 kg box a distance 6.00 m on a rough horizontal surface. If the box moves quickly constant, determine: A. The work that reverses the 150 N force. B. The coefficient of kinetic friction between the box and the surface.
24. A skier of mass 70 kg is pulled up a slope by a motor-driven cable. How many horsepower output must a motor have to pull him 100 m up a 30° frictionless slope at a constant speed of 2 m/s? a.700 b. 0.94 c. 746 d. 1.06 a b d
1. A 7.50-kg box initially at rest slides down a 15.0 m long incline that makes an angle of 22.0° with the horizontal (see figure). At the bottom of the incline, the speed of the box is 3.00 m/s. a) Draw a free body diagram, detailing all of the forces acting on the box. b) Using the work done by non-conservative forces relationship, find the algebraic expression for the coefficient of kinetic friction between the box and the incline. c) Calculate the coefficient of kinetic friction.
2. A boy pulls a 26.0-kg box with a 170-N force at 38° above a horizontal surface. If the coefficient of kinetic friction between the box and the horizontal surface is 0.18 and the box is pulled a distance of 28.0 is the net work done on the box? J 16 cct il6 cci16 what 091103 5 cci16 cei cei16
A box of mass 10 kg initially was at rest on a frictionless horizontal table. After applying a force of 10 N, the box moves in the right direction at a speed of 5 m/s. What is the work done by the external force on the box? Select one: O a. 50 J Ob 450 J O c. 125 J O d. 100 J
A ramp is inclined at an angle of 30°. A 5 kg block has an initial speed of 8 m/s up a ramp. It comes to rest after traveling 3 m. There is friction between the block and the ramp. a. Draw the free body diagram for the block. b. What is ∆K for the block? c. What is ∆Ugrav for the block? d. What is the work done by friction? e. What is the work done by the normal force? f. What is the coefficient of kinetic friction? g. The coefficient of static friction is 0.7. After the block comes to rest, does it start sliding down the ramp, or does it remain fixed in position? Explain your reasoning and state how much friction acts on the block. Draw the free body diagram.
A box sits on the horizontal bed of a truck that is accelerating to the left, as shown in the diagram. Static friction between the box and the truck keeps the box from sliding around as the truck accelerates. The work done on the box by the static friction force as the accelerating truck moves a distance D to the left is A. Positive B. Zero C. Negative D. Dependent upon the speed of the truck
A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s2. Match the answers with questions. the final kinetic energy of the box (Kf) the change in kinetic energy of the box (ΔK) A. 320 J B. 20 J C. -320 J D. -20 J E. 50 J F. -50 J G. 0 J
1. A block is accelerated with a = 8. The initial velocity of the block is VF 2 m/s. A. If the block is accelerated for t = 3 s. Find the position of the block. B. Use the work-energy theorem to find the final velocity of the block. Where the distance d is the position you find in part (A). ins

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