An Astronaut Stands by the Rim of a Crater on the Moon

Multiple Choice

An astronaut stands by the rim of a crater on the Moon, where the acceleration of gravity is 1.62 m/s² and there is no air. To determine the depth of the crater, she drops a rock and measures the
Time it takes for it to hit the bottom. If the time is 6.3 s, what is the depth of the crater?

A) 32 m
B) 14 m
C) 38 m
D) 10 m
E) 26 m