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Q.

A block can slide down an a smooth inclined plane of inclinationθ , kept on a floor of a lift. When then lift is descending with a retardation a. The acceleration of the block relative to the incline is

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a

a−gsinθ

b

g−a

c

(g−a)sinθ

d

(g+a)sinθ

answer is D.

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Detailed Solution

On inclined plane a=gsinθ  ∴N=(g+a)sinθ
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