What is the velocity of block B?

1 m/s in downward direction

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1 m/s in upward direction

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2 m/s in downward direction

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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 $v_{A} = 4 v_{B}$
If velocity of block A is 4 m/s downwards, velocity of A will be 1 m/s upwards.

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What is the velocity of block B?

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.

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 $v_{A} = 4 v_{B}$
If velocity of block A is 4 m/s downwards, velocity of A will be 1 m/s upwards.