problem07_71

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

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7.71: The first condition, that the maximum height above the release point is h , is expressed as mgh kx = 2 2 1 . The magnitude of the acceleration is largest when the spring is compressed to a distance x ; at this point the net upward force is ma mg kx = - , so the second condition is expressed as
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Unformatted text preview: ) )( ( a g k m x + = . a) Substituting the second expression into the first gives . 2 ) ( or , ) ( 2 1 2 2 2 gh a g m k mgh a g k m k + = = + b) Substituting this into the expression for x gives a g gh x + = 2 ....
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