A block is kept on the floor of an elevator at rest. The elevator starts descending with an acceleration of 12 m/s2 . Find the displacement (in cm) of the block during the first 0.2 s after the start. Take g = 10 m/s2 .

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A block is kept on the floor of an elevator at rest. The elevator starts descending with an acceleration of 12 m/s² . Find the displacement (in cm) of the block during the first 0.2 s after the start. Take g = 10 m/s² .

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answer is 20.

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As the elevator is going down with an acceleration of 12ms^-2.

The block detaches from the elevator floor and starting falling freely under gravity.

$s = \frac{1}{2} 10 {(0.2)}^{2} = 0.2 m = 20 cm$

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