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The bob of a pendulum is released from a horizontal position. If the length of pendulum is 2 m, what is the speed with which the bob arrives at the lower most point. Assume that 10% of its energy is dissipated against air resistance.
(Take `g = 10 m s^(-2)`)

A

`8 ms^(-1)`

B

`4.5 ms ^(-1)`

C

`5 ms ^(-1)`

D

`6 ms ^(-1)`

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The correct Answer is:
D
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