Q.
In the figure shown block B moves down with a velocity 10 m/s. The velocity of A in the position shown is
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a
12.5 m/s
b
25 m/s
c
6.25 m/s
d
None of these
answer is B.
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Detailed Solution
If B moves down at 10m/s . Therefore length of the string between A and the pulley is decreasing at a rate of 20m/sVAcos37=20m/s VA=20cos37=25m/s
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