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A block of mass m can slide on a smooth ...

A block of mass m can slide on a smooth inclined plane of inclination `theta` kept on the floor of a lift . When the lift is descending with retardation a,

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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AAKASH SERIES-LAWS OF MOTION-EXERCISE - I
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  11. If particle stays at rest as seen from a frame of reference

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