A block of mass m is kept on a platform which starts from rest with a constant acceleration g / 2 upwards, as shown in the figure. Work done by normal reaction on block in time t is

Question

A block of mass m is kept on a platform which starts from rest with a constant acceleration g / 2 upwards, as shown in the figure. Work done by normal reaction on block in time t is, - m g 2 t 2 8, m g 2 t 2 8, 0, 3 m g 2 t 2 8

MARKS App · Accepted Answer

N - m g = m g 2 N = 3 m g 2 s = u t + 1 2 a t 2 = 0 + 1 2 g 2 t 2 = g 4 t 2 W N = 3 m g 2 × g 4 t 2 = 3 m g 2 t 2 8 = 3 m g 2 t 2 8

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