# A block A can slide on a frictionless incline of angle θ and length l, kept inside an elevator going up with uniform velocity u (figure 5-E22). Find the time taken by the block to slide down the length of the incline if it is released from the top of the incline.

Given:

The force on the block which makes the body move down the plane is the component of its weight parallel to the inclined surface.

F = mg sinθ

Acceleration, g = sin θ

Initial velocity of block, u = 0

Distance to be covered ,s = l

a = g sin θ

Using, , we get:

Time taken, t=

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