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COE in SHM

Which of the ...

Question

Which of the following quantities is non-zero at the mean position for a particle executing SHM?

A

force

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B

acceleration

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C

velocity

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D

displacement

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Solution

The correct option is C velocity
At mean position, displacement, $x = 0$ . Since for SHM, acceleration is directly proportional to $x$ , so acceleration is also 0.
Hence $F = m a$ is also zero.
But velocity is not zero (it is zero at extreme positions)

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