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A pendulum of length l=1m is released fr...

A pendulum of length `l=1m` is released from `theta_(0)=60^(@)` . The rate of change of speed of the bob at `theta=30^(@)` is.

A

`5 sqrt3 m//s^2`

B

`5 m//s^2`

C

`10 m//s^2`

D

`2.5 m//s^2`

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The correct Answer is:
B
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