College Physics: A Strategic Approach
3rd Edition
ISBN: 9780321907233
Author: Field
Publisher: YUZU
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Textbook Question
Chapter 4, Problem 12CQ
If you are standing still, the upward normal force on you from the floor is equal in magnitude to the weight force that acts on you. But it’s possible to move so that the normal force is greater than your weight. Explain how this could be done.
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If a nonzero constant net external force acts on an object during a given period, which of the following statements must be true during that time?
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A block with a mass of m = 22 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1 = 12 N. The second has a magnitude of F2 = 18.25 N and acts on the body at an angle θ = 19° measured from horizontal, as shown.
Write an expression for the magnitude of the normal force, FN, acting on the block, in terms of F2, g, and the other variables of the problem. Assume that the surface it rests on is rigid.
Write an expression for the component of net force, Fnet,x, in the x-direction, in terms of the variables given in the problem statement.
Part (d) Find the block's acceleration in the x-direction, ax, in meters per second squared.
Chapter 4 Solutions
College Physics: A Strategic Approach
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