Answer to Question #271592 in Calculus for keke

Question

On the moon the acceleration of gravity is 1.6 m/sec2. If a rock is dropped into a crevasse, how fast will it be going just before it hits the bottom 30 seconds later.

Answer 1

The acceleration is constant, so the velocity is proportional to the time:

$v = at = 1.6\,\mathrm{m/s^2}\cdot 30\,\mathrm{s} = 48\,\mathrm{m/s}$ and it is directed downwards.