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Frames of Reference

Find velocity...

Question

Find velocity of block $^{'} B^{'}$ at the instant shown in the figure.

25 m / s

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20 m / s

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22 m / s

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30 m / s

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Solution

The correct option is B $25 m / s$
Given,
Velocity of block $V_{A} = 10 m / s$
Velocity of string is twice of velocity of A $= 20 m / s$
Horizontal velocity of block B $= 20 cos 37^{o} = 16 m / s$

Velcity of block B is $16 m / s$

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