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At a certain moment of time, acceleratio...

At a certain moment of time, acceleration of the block A is 2 `m//s^(2)` . Upward and acceleration of block B is 3 `m//s^(2)` upward. The acceleration of block C is ( masses of pulleys and string are negligible )

A

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

B

` 7 m//s^(2)`

C

` 8 m//s^(2) downward`

D

` 7 m//s^(2) downward`

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The correct Answer is:
D
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