Question

What will be the displacement of a block in first 0.2s if the block is kept on the floor of an elevator at suddenly elevator starts descending with an acceleration 13 m/s2. (take g = 10 m/s2)

Answer 1

Relative acceleration for block is 3 m/s^2 in upward direction

So,

s = 0.5 at^2 = 0.5 * 3 * 0.2 * 0.2 = 0.06m