A man wishes to pull a crate 15m across a rough floor by exerting a force of 100 N. The coefficient of kinetic friction is 0.25. For the man to do the least work, the angle between the force and the horizontal should be:
A man wishes to pull a crate 15m across a rough floor by exerting a force of 100 N. The coefficient of kinetic friction is 0.25. For the man to do the least work, the angle between the force and the horizontal should be:
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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A man wishes to pull a crate 15m across a rough floor by exerting a force of 100 N. The
coefficient of kinetic friction is 0.25. For the man to do the least work, the angle between the
force and the horizontal should be:
A. 0
B. 14?
C. 43?
D. 66?
E. 76?
according to the memo, the answer is A. 0 degrees.
please explain why.
i was under the impression that work done is at its maximum when the angle between the force and displacement is zero, so 0 degrees would be the most incorrect answer. thank you.
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