·4.10 understand that work done is equal to energy transferredPFY p.112
2) Wd=F x d
5 x 2 = 10J
Wd= F x d
500 x 40 = 20,000 J
energy transfers = GPE --> kinetic
50,000= 400 x d1) Wd = F x d
d= 50,000/400 = 12500 m
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