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Q.

A body is slipping from an inclined plane of height h and length l. If the angle of inclination is θ, the time taken by the body to come from the top to the bottom of this inclined plane is

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a

2hg

b

2lg

c

1sin⁡θ2hg

d

sin⁡θ2hg

answer is C.

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Detailed Solution

Force down the plane =mgsin⁡θ Acceleration down the plane =gsin⁡θ Since l=0+12gsin⁡θt2t2=2 lgsin⁡θ=2hgsin2⁡θ⇒t=1sin⁡θ2hg
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