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Answer to Question #33007 in Mechanics | Relativity for Phone Aung Kha

Question #33007
A weight of mass M is attached to the bottom end of a suspended spring. Initially the weight is supported with a board so that the spring is at its natural length. Next the board is gentally lowered. When the spring is extended distance D, the weight separates from the board and come to rest. Let the total mechanical energy of the spring and weight be defined as U1 and for the state after the weight separates from the board as U2. What is (U2-U1)?why is the answer (1/2)mgd?
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10.07.13, 15:03

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09.07.13, 19:04

Thanks for the answer.

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