A block of mass m is kept on a platform. Platform starts moving upwards with an acceleration of g 2 . Find the work done by the normal force on the block in the first one second.

Question

A block of mass m is kept on a platform. Platform starts moving upwards with an acceleration of g 2 . Find the work done by the normal force on the block in the first one second., 3 m g 2 2, zero, 3 m g 2 8, 3 m g 2 4

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 1 2 = g 4 W N = 3 m g 2 × g 4 = 3 m g 2 8 = 3 m g 2 8

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