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Q.

A block is kept on a frictionless inclined surface with angle of inclination α. The incline is given an acceleration a to keep the block stationary. Then a is equal to :

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a

g tan α

b

g

c

gtan⁡α

d

g cosec α

answer is D.

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Detailed Solution

FBD of block w.r.t. wedge,
N sin α = ma and N cos α = mg

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a = g tan α

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