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A block B is suspended from a cable that...

A block B is suspended from a cable that is attached to the block at E, wraps around three pulleys and is tied to the back of a truck D. The truck starts from rest when `x_(o)` is zero and moves forward with a constant acceleration of `a_(p)=3//2m//s^(2)` the speed of the block at the instant when `x_(o) = 3` m is

A

`(1)/(5) m//s`

B

`(2)/(5) m//s`

C

`(3)/(5) m//s`

D

`1 m//s`

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The correct Answer is:
C
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