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What is the potential energy of a 20-kg rock perched at the top of a cliff with a height of 100 meters? O A. 2,000 J B. 19,600 J O C. 0.23 D. 200,000 J

What is the potential energy of a 20kg rock perched at the top of a cliff with a height of 100 meters O A 2000 J B 19600 J O C 023 D 200000 J class=

Respuesta :

The Potential Energy, is given by:

[tex]PE=m\times g\times h[/tex]

where:

m = mass of the object (in Kg)

g = gravity

h = height (in m)

Hence:

[tex]PE=20\times9.8\times100=19,600[/tex]

ANSWER

B. 19,600 J

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