In the figure shown the block B moves with a velocity 10 m/s. The velocity of A in the position shown is

In the figure shown the block B moves with a velocity 10 m/s. The velocity of A in the position
shown is

A
12.5 m/s
B
25 m/s
C
8 m/s
D
16 m/s

Solution:

$2 T V_{B} = T \times V_{A} \cos 37 ° 2 \times 10 = V_{A} \times \frac{4}{5} \Rightarrow V_{A} = 5 \times 5 = 25 m / s$

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