A stone is dropped from rest at a height of 2.0 m above the surface of a planet.
The planet has no atmosphere.
The speed of the stone just before reaching the surface of the planet is 3.8 m/s.
What is the acceleration of free fall on the planet?
A zero
B 1.9 m/s²
C 3.6 m/s²
D 7.2m/s²
