Problem

Problem

A smooth inclined plane of length LL having inclination θ\theta with the horizontal is inside a lift which is moving down with a retardation aa. The time taken by a body to slide down the inclined plane from rest will be a. 2L(g+a)sin⁡θ\sqrt{\frac{2L}{(g+a)\sin\theta}} b. 2L(g−a)sin⁡θ\sqrt{\frac{2L}{(g-a)\sin\theta}} c. 2Lasin⁡θ\sqrt{\frac{2L}{a\sin\theta}} d. 2Lgsin⁡θ\sqrt{\frac{2L}{g\sin\theta}}

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