Question

To determine freefall acceleration on a moon with no atmosphere, you drop your handkerchief off the roof of a baseball stadium there. The roof is 113 meters tall. The handkerchief reaches the ground in 18.2 seconds. What is freefall acceleration on this moon? (State the result as a positive quantity.)

Answer 1

From the equations of the motion
h = gt²/2;
g = 2h/t² = 2*113 / 18.2² = 0.68 m/s²