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A bob is suspended from a crane by a cab...

A bob is suspended from a crane by a cable of length `l=5 m`. The crane and load are moving at a constant speed `v_(0)`. The crane is stopped by a bumper and the bob on the cable swings out an angle of `60^(@)`. The initial speed `v_(0)` is `(g=9.8 m//s^(2))`

A

10 m/s

B

7 m/s

C

4 m/s

D

2 m/s

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The correct Answer is:
B
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