a rock on a top of a cliff has a potential energy of 1 200J.What is the work done in lifting the rock up the cliff from the ground?
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Answer: pe=mgh
1200= m x 9.8 x h
1200= 9.8mh
1200/9.8 =MH
122.44897959 = MH
Explanation:
H not given so this is the conclusion I get
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