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A block can slide down an a smooth incli...

A block can slide down an a smooth inclined plane of inclination `theta`, kept on a floor of a lift. When the lift is descending with a retardation a. The acceleration of the block relative to the incline is

A

`a-g sin theta`

B

`g-a`

C

`(g-a)sin theta`

D

`(g+a)sin theta`

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The correct Answer is:
D
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