如何计算Free Fall

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Free fall is the motion of an object falling solely under gravity, with no air resistance. Near Earth's surface, all objects accelerate at g = 9.81 m/s² regardless of mass — a fact Galileo demonstrated and Einstein explained through general relativity.

分步指南

1. 1Velocity at time t: v = g × t (starting from rest)
2. 2Distance fallen: d = ½ × g × t²
3. 3Time to fall distance d: t = √(2d / g)
4. 4Velocity after falling height h: v = √(2gh)

例题解析