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A body executes S.H.M with an amplitude A. At what displacement from the mean position is the potential energy of the body is one fourth of its total energy ?
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- A / 4
- A / 2
- 3A / 4
- Some other fraction of A.
Correct Option: B
P.E. , V = | mω2 x2 | |
2 |
Total energy , E = | mω2 A2 | |
2 |
P.E. = | E ⇒ | mω2 x2 = | mω2 A2 | |||
4 | 2 | 8 |
∴ x = | A | |
2 |