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A 2.0-kg rock falls from a height of 25 m to a point 20 m above the ground.
How much potential energy does it lose?

mg = 2.0 kg
h/d = 5 m

PE = mgh

PE = (2)(5)
PE = 10 J

  • Physics -

    NO. PE=mgh
    you did not include the value of g.

  • Physics -

    OK, i was told by my teacher that mg would equal together 2 kg. If your including g then:

    PE = mgh
    PE = (2)(9.8)(5)
    PE = 98 J

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