Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 5, Problem 57P
(a)
To determine
The coefficient of the kinetic friction between the two given blocks.
(b)
To determine
The acceleration of the
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30
Chapter 5 Solutions
Physics for Scientists and Engineers
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- An automobile driver traveling down an 8% grade slams on his brakes and skids 30 m before hitting a parked car. A lawyer hires an expert who measures the coefficient of kinetic friction between the tires and road to be k = 0.45. Is the lawyer correct to accuse the driver of exceeding the 25-MPH speed limit? Explain.arrow_forwardIf you press a book flat against a vertical wall with your hand, in what direction is the friction force exerted by the wall on the book? (a) downward (b) upward (c) out from the wall (d) into the wall.arrow_forwardFor the woman being pulled forward on the toboggan in Figure 4.33, is the magnitude of the normal force exerted by the ground on the toboggan (a) equal to the total weight of the woman plus the toboggan, (b) greater than the total weight, (c) less than the total weight, or (d) possibly greater than or less than the total weight, depending on the size of the weight relative to the tension in the rope?arrow_forward
- A 3.00-kg block starts from rest at the top of a 30.0 incline and slides a distance of 2.00 m down the incline in 1.50 s. Find (a) the magnitude of the acceleration of the block, (b) the coefficient of kinetic friction between block and plane, (c) the friction force acting on the block, and (d) the speed of the block after it has slid 2.00 m.arrow_forward14. Figure 5-34 shows three blocks being pushed across a frie- tionless floor by horizontal force F. What total mass is acceler- ated to the right by (a) force F, (b) force F, of block 1 on block 2, and (c) force F of block 2 on block 3? (d) Rank the blocks according to their accelerations, greatest first. (e) Rank forces F, F, and F32 according to their magnitude, greatest first. (Warmup for Problem 40) 10 kg 5 kg 2 kg 3.arrow_forwardA 2.40-kg block starts from rest at the top of a 30.0° incline and slides a distance of 2.10 m down the incline in 2.00 s. (a) Find the magnitude of the acceleration of the block. m/s² (b) Find the coefficient of kinetic friction between block and plane. (c) Find the friction force acting on the block. magnitude N direction -Select--- (d) Find the speed of the block after it has slid 2.10 m. m/sarrow_forward
- A 4-kg block rests on a horizontal surface. The block is pulled by 20 N force acting 25⁰ above the horizontal but not enough to move the block. Calculate the following: (a) the friction force between the surface and the block. (b) the normal force on the block. (c) the coefficient of static friction.arrow_forwardA 2.17-kg object is situated at rest on a horizontal surface with a static friction coefficient of 0.56. Calculate the maximum force of the static friction.arrow_forwardA 150-N box is being pulled horizontally in a wagon accelerating uniformly at 3.00 m/s2. The box does not move relative to the wagon, the coefficient of static friction between the box and the wagon's surface is 0.600, and the coefficient of kinetic friction is 0.400. The friction force on this box is closest toarrow_forward
- A hockey puck on a frozen pond is given an initial speed of 20.0 m/s. If the puck always remains on the ice and slides 115 m before coming to rest, determine the coefficient of kinetic friction between the puck and ice. Motion mgarrow_forwardA horizontal force of 200 N is used to push a 50.0-kg packing crate a distance of 6.00 m on a rough horizontal surface. If the crate moves at constant speed, the coefficient of kinetic friction between the crate and surface.arrow_forwardShoes made for the sports of boulderingand rock climbing are designed to provide a great deal of frictionbetween the foot and the surface of the ground. Such shoes on smoothrock might have a coefficient of static friction of 1.2 and a coefficient ofkinetic friction of 0.90. If the person steps onto a smooth rock surface that’s inclined at an angle large enough that these shoes begin to slip, what will happen? (a) She will slide a short distance and stop; (b) she will accelerate down the surface; (c) she will slide down the surface at constant speed; (d) we can’t tell what will happen without knowing her mass.arrow_forward
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