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

A block of mass m is placed on a smooth wedge of wedge angle `theta` The whole system is accelerated horizontally so that the block does not slip on the wedge. The force (normal reaction) exerted by the wedge on the block has a magnitude:

A

`mg tan theta`

B

`(mg)/(cos theta)`

C

mg

D

`mg cos theta`

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The correct Answer is:
B
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