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A block of mass m is placed on a smooth ...

A block of mass m is placed on a smooth inclined wedge ABC of inclination `theta` as shown in the figure. The wedge is given an acceleration 'a' towards the right. The relation between a and `theta` for the block to remain stationary on the wedge is

A

`a=(g)/("cosec "theta)`

B

`a=(g)/(sin theta)`

C

`a=g cos theta`

D

`a=g tan theta`

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The correct Answer is:
D
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