Question

A block is kept on the floor of an elevator at rest. The elevator starts descending with an acceleration of 12 m/s ². Find the displacement of the block during the first 0.2 s after the start. Take g = 10 m/s ².

Answer 1

Because, the elevator is moving downward with an acceleration 12 m/s² (>g), the bodygets separated. So, body moves with acceleration g = 10 m/s² [freely falling body] and the elevator move with acceleration 12 m/s²