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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 = frac(g)(cosectheta)`

B

`a = frac(g)(sintheta)`

C

`a = g cos theta`

D

`a = g tan theta`

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