Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 5, Problem 129P
To determine
The coefficient of kinetic friction
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Physics for Scientists and Engineers
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- A 1250 kg boat is traveling at 90 km/h when its engine is shut off. The magnitude of the frictional force fk between boat and water is proportional to the speed v of the boat. Thus, fk = 80v, where v is in meters per second and fk (the magnitude of the frictional force) is in newtons. Find the time required for the boat to slow down to 45 km/h.arrow_forwarda 400 N block slides on a horizontal plane by applying a horizontal force of 200 N and reaches a velocity of 20 m/s in a distance of 30 m. from rest. compute the coefficient of friction between the floor and the block.arrow_forwardA block of mass 0.500 kg slides on a flat smooth surface with a speed of 2.80 m/s . It then slides over a rough surface with uk and slows to a halt. While the block is slowing, (a) what is the frictional force on the block? (b) What is the magnitude of the block's acceleration? (c) How far does the block slide on the rough part before it comes to a halt?arrow_forward
- A 1000 kg boat is traveling at 90 km/h when its engine is shut off. The magnitude of the frictional force between boat and water is proportional to the speed v of the boat: fk 70v, where v is in meters per second and fk is in newtons. Find the time required for the boat to slow to 45 km/h.arrow_forwardA 1370-kg car is skidding to a stop along a horizontal surface. The car decelerates from 27.6 m/s to a rest position in 3.15 seconds. Assuming negligible air resistance, determine the coefficient of friction between the car tires and the road surface.arrow_forwardExpress answers in significant figures and scientific notation only. An athlete slides down from rest 40.0 meter along an icy hill which is 35 degrees from the horizontal. He then continues sliding on the level ice. a) If the coefficient of kinetic friction between the athlete and ice is 0.20 (neglect air resistance) find speed (m/s) of the athlete at the foot of the plane. b) find the distance (m) from the foot of the plane to the point where he has landed to the level icearrow_forward
- When being unloaded from a moving truck, a 10.0- kilogram suitcase is placed on a flat ramp inclined at 36.0 o. When released from rest, the suitcase accelerates down the ramp at 1.42 m/s². What is the coefficient of kinetic friction between the suitcase and the ramp?arrow_forwardA block of mass m =1 kg, slides down a rough incline with constant velocity. The coefficient of kinetic friction between the block and the incline is µr, and the incline makes an angle 0 = 30° horizontal. Take g = 10 m/s2. The coefficient of kinetic friction µ is then equal to: v= constant with the O 0.577 O 0.466 O 0.422 O 0.364arrow_forwardA skier of mass 65.0 kg is pulled up a snow-covered slope at constant speed by a towrope that is parallel to the ground. The ground slopes upward at a constant angle of26.0 degree above the horizontal, and you can ignore friction. Draw a clearly labelled FBD forthe skier.arrow_forward
- An object of mass m is being affected by the force F = kix, Wwhere k is a positive constant. The object leaves the origin with a speed x, at time t= 0. Find x(t).arrow_forwardA hockey puck is sliding across a level frozen pond with an initial speed of 8.5 m/s. Friction is NOT negligible, and it comes to rest after sliding a distance of 28.996 m. What is the coefficient of kinetic friction between the puck and the ice?arrow_forwardTwo blocks are sliding down a 30◦ incline. The first block is 2 kg and has a kinetic friction coefficient of .10. The second block - which is connected to the first block by a rope - is 1 kg with a kinetic friction coefficient of .20. What is the tension in the string?arrow_forward
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