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A vertical spring with force constant k is fixed on a table. A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance d. The net work done in the process is
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mg(h + d) - 1 kd2 2 -
mg(h - d) - 1 kd2 2 -
mg(h - d) + 1 kd2 2 -
mg(h + d) + 1 kd2 2
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Correct Option: A
Gravitational potential energy of ball gets converted into elastic potential energy of the spring.
| mg(h + d) = | kd2 | |
| 2 |
| Net work done = mg(h + d) - | kd2 = 0 | |
| 2 |
