parkerb2004 parkerb2004
  • 09-04-2018
  • Physics
contestada

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

Respuesta :

AL2006
AL2006 AL2006
  • 09-04-2018
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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