A 0123-kg ball is dropped from a height of 119 m and lands, Ask an Expert

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A 0.123-kg ball is dropped from a height of 1.19 m and lands on a light (approximately massless) cup mounted on top of a light, vertical spring initially at its equilibrium position. The maximum compression of the spring is to be 11.5 cm.

a) What is the required spring constant of the spring? (2mgH)/x^2

b) Suppose you ignore the change in the gravitational energy of the ball during the 11.5-cm compression. What is the percentage difference between the calculated spring constant for this case and the answer obtained in part a)?

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