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重力势能

Gravitational Potential Energy

kg
m
m/s²

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Conservation of energy: GPE lost = KE gained (ignoring friction). A ball dropped from 10m hits the ground at v = √(2gh) = √(2×9.81×10) ≈ 14 m/s = 50 km/h.

难度:中级

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The Hoover Dam's Lake Mead holds 36.7 km³ of water at an average height of ~150m. The gravitational potential energy stored is roughly 50 petajoules — about 12 megatons of TNT equivalent.

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Reviewed May 2026
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