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A pendulum bob has a speed of 3m//s at i...

A pendulum bob has a speed of `3m//s` at its lowest is position. The pendulum is 0.5m long. The speed of the bob, when string makes an angle of `60^@`to the vertical is

A

2 m/s

B

1/2 m/s

C

1 m/s

D

2.5 m/s

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