1. Tardigrade
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  3. Physics
  4. An elevator, in which a man is standing, is moving upward with a constant acceleration of 2 m/s2 . At some instant when speed of elevator is 10 m/s, the man drops a coin from a height of 1.5 m. Find the time taken by the coin to reach the floor.

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Q. An elevator, in which a man is standing, is moving upward with a constant acceleration of $2 \,m/s^2$ . At some instant when speed of elevator is $10\, m/s$, the man drops a coin from a height of $1.5\, m$. Find the time taken by the coin to reach the floor.

Motion in a Straight Line

Solution:

$d_{rel} = \frac{1}{2} a_{rel} t^2$
$\Rightarrow 1.5 = \frac{1}{2}(10 + 2)t^2$
$1.5 = \frac{1}{2} \times 12 \times t^2$
$\Rightarrow t = \frac{1}{2} s$