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A block of mass 'm' is placed on a frictionless inclined plane of inclination $θ$ with horizontal. The inclined plane is accelerated horizontally so that the block does not slide down. In this situation, vertical force exerted by the inclined plane on the block is:

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mg/cos $θ$

mg cos $θ$

none of these

mg sin $θ$

answer is C.

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Detailed Solution

FBD of m w.r.t. wedge

N cos $θ$ - mg
N = mg/cos $θ$

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