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Questions  

A smooth inclined plane of inclination 300  is fixed in a lift which is moving down with an acceleration 'g/4'.  If the base of the inclined plane is 'L', the time taken by a body released at the top of the inclined plane to reach the bottom is

a
32 L33 g
b
4 L3 g
c
43 Lg
d
16 L3 g

detailed solution

Correct option is A

t=2ℓ(g−a)sinθ                                                                                 ℓ=Lcosθ =2L(g−a)sinθcosθ=2L(g−g4)(12)(32)   =32L33g

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