# physical science

posted by erika

If sam drops a 40 kg mass from a height of 20 meters on earth how much was the potential energy of the mass before he dropped it

a-800 j
b-784 n-m
c-800 n-m
d-7840 j
e- 200 j

1. Anonymous

dsf

2. Henry

PE = M*g*h =

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