University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 5, Problem 5.38E
A box with mass m is dragged across a level floor with coefficient of kinetic friction μk by a rope that is pulled upward at an angle θ above the horizontal with a force of magnitude F.
- (a) In terms of m, μk, θ and g, obtain an expression for the magnitude of the force required to move the box with constant speed.
- (b) Knowing that you are studying physics, a CPR instructor asks you how much force it would take to slide a 90-kg patient across a floor at constant speed by pulling on him at an angle of 25° above the horizontal. By dragging weights wrapped in an old pair of pants down the hall with a spring balance, you find that μk = 0.35. Use the result of part (a) to answer the instructor’s question.
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Chapter 5 Solutions
University Physics (14th Edition)
Ch. 5 - A man sits in a seat that is hanging from a rope....Ch. 5 - In general, the normal force is not equal to the...Ch. 5 - A clothesline hangs between two poles. No matter...Ch. 5 - You drive a car up a steep hill at constant speed....Ch. 5 - For medical reasons, astronauts in outer space...Ch. 5 - To push a box up a ramp, which requires less...Ch. 5 - A woman in an elevator lets go of her briefcase,...Ch. 5 - A block rests on an inclined plane with enough...Ch. 5 - A crate slides up an inclined ramp and then slides...Ch. 5 - A crate of books rests on a level floor. To move...
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