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Contact [7]
3 years ago
7

A 20-kg rock sits atop a 30 meter cliff. How much potential energy does it have?

Physics
1 answer:
Brut [27]3 years ago
6 0
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
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