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Question

What is the velocity of block B?


A

1 m/s in downward direction

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B

1 m/s in upward direction

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C

2 m/s in downward direction

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D

2 m/s in upward direction

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Solution

The correct option is B

1 m/s in upward direction


Suppose block B moves up by "x" distance.

So, 4x length of string will be free and block A will descend by 4x distance and vA=4vB
If velocity of block A is 4 m/s downwards, velocity of A will be 1 m/s upwards.


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