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problem05_93

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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5.93: a) The only horizontal force on the two-block combination is the horizontal component of . cos , α F F The blocks will accelerate with ). ( cos 2 1 m m F a + = α b) The normal force between the blocks is , sin 1 α F g m + for the blocks to move together, the product of this force and s μ must be greater than the horizontal force that the lower block exerts on the upper block. That horizontal force is one of an action-reaction pair; the
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Unformatted text preview: reaction to this force accelerates the lower block. Thus, for the blocks to stay together, ). sin ( 1 s 2 F g m a m + ≤ Using the result of part (a), ). sin ( m cos 1 s 2 1 2 F g m m F m + ≤ + Solving the inequality for F gives the desired result....
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