Sagot :
Since the mass is not given, we will just derive is as the variable of m
If the height of the rock is 0m, there is no Potential Energy.
If the height of the rock is 1 m, the potential energy is just 9.8 times the mass of the rock.
At 20 m
PE = mgh
PE = (m)(9.8)(20)
PE = 196m
At 50 m
PE = mgh
PE = (m)(9.8)(50)
PE = 490m
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