Find the velocity (VA) of block A in the shown figure.
A
14m/s downwards.
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B
16m/s upwards.
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C
12m/s downwards.
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D
10m/s upwards.
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Solution
The correct option is B16m/s upwards. Given the condition
As per the pulley formula, taking upward positive, we have VP=VA+VB2
Now, suppose the block A moves upward, then we have VP=VA+VB2⇒10=VA+42 ⇒VA=16m/s
Hence, velocity of block A is 16m/s upwards.