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A 20-kg rock sits atop a 30 meter cliff. How much potential energy does it have?
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A 20-kg rock sits atop a 30 meter cliff. How much potential energy does it have?
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Apr 11, 2019
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A 20-kg rock sits atop a 30 meter cliff. How much potential energy does it have?
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Gravitational potential energy ...
= (mass) x (acceleration of gravity) x (height)
= (20 kg) x (9.8 m/s²) x (30 m)
= (20 x 9.8 x 30) kg-m²/sec²
=
5,880 joules
Estanford
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Apr 15, 2019
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