Question #1018

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.)

Expert's answer

From the equations of the motion

h = gt^{2}/2;

g = 2h/t^{2} = 2*113 / 18.2^{2} = 0.68 m/s^{2}

h = gt

g = 2h/t

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