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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A car (m = 1770 kg) is parked on a road that rises 18° above the horizontal. What are the magnitudes of (a) the normal
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- A constant force Fa pushes a 22.5-kg box across a rough horizontal surface. The magnitude of Fa is 185 N and the force is inclined at an angle of θ = 30.0° below the horizontal. The coefficient of kinetic friction between the box and the surface is μk = 0.500. What is the magnitude of the box's acceleration?arrow_forwardA cougar bites a llama of mass m and drags it across some rough horizontal ground. The cougar applies a horizontal force of magnitude F, and the llama is dragged at a constant velocity. The coefficient of kinetic friction is μk. While the cougar applies the force F, the magnitude of the kinetic friction force, fk , on the llama obeys: a)F > µk m g > fk b)F = fk = µk m gc)F = fk < µk m gd)cannot answer, not enough information givene) F > fk = µk m garrow_forwardProblem 1: While training on the planet Dagobah, Luke Skywalker is asked by Yoda to hold a block with a mass of 6.80kg against a vertical wall using only the Force. Luke applies the Force with a magnitude of 115.0N at an angle of 52.0° with respect to the horizontal. Luke discovers that if the Force increases any more, the block begins to slide up the wall. What is the coefficient of static friction between the block and the wall? Assume that gravity on Dagobah is the same as gravity on Earth.arrow_forward
- A block is pressed against a vertical wall by a force F, as the drawing shows. This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The magnitude of the force is different in the two cases, while the directional angle is the same. Kinetic friction exists between the block and the wall, and the coefficient of kinetic friction is 0.260. The weight of the block is 47.0 N, and the directional angle for the force F is 0 = 48.0°. Determine the magnitude of F when the block slides (a) up the wall and (b) down the wall. (a) P = (b) P= i i P >arrow_forwardA block 5.0 kg is on an inclined plane. If the friction coefficient (static and kinetic) between the block and the plane is μ = 0.5, and the angle θ = 35°, determine the maximum friction force that the plane could exert on the block. The block is not necessarily at rest. Use g = 10 N/kg.arrow_forwardYou are pulling your luggage in an air port for an international flight. You know not to pack too much else they charge you extra fees so you weighted your luggage at home to be 22.0 kg. You exert a pull of 46 N in magnitude and at 24 degrees above the horizontal to ensure you can walk at a constant speed on the carpeted floor. What is the coefficient of friction between the caster wheels and the carpet?arrow_forward
- A 235 N crate rests on a ramp; the maximum angle just before it slips is 27.8° with the horizontal. What is the coefficient of static friction between crate and ramp surfaces? Answer:arrow_forwardA tug-of-war match happens between Team Blue and Team Red. Each of Team Blue’s members has an average mass of 76 kg and exerts an average force of 1225 N horizontally. Each of Team Red’s members has an average mass of 78 kg and exerts an average force of 1275 N horizontally. What is the tension in the section of rope between the teams?arrow_forwardA large cube (mass = M) being accelerated across a horizontal frictionless surface by a horizontal force . A small cube (mass = m) is in contact with the front surface of the large cube and will slide downward unless is sufficiently large. The coefficient of static friction between the cubes is u. What is the smallest magnitude that F can have in order to keep the small cube from sliding downward?arrow_forward
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