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On a train moving along east with a cons...

On a train moving along east with a constant speed v, a boy revolves a bob with string of length l on smooth surface of a train, with equal constant speed v relative to train. Mark the correct option(s).

A

Maximum speed of bob is 2 v in ground frame

B

Tension in string connecting bob is `(4mv^(2))/(l)` at an instant

C

Tension in string is `(mv^(2))/(l)` at all the moments.

D

Minimum speed of bob is zero in ground frame

Text Solution

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The correct Answer is:
A, C, D
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