4.Ep=m.g.h
6.000J=m.10m/s2.12m
m=6000J/120s2
m=50kg
∆Ep=m.g.(h2-h1)
=50kg.10m/s2.8m
=4000J
5.Ek1:Ek2
½m.v:½3m.2v
½m.v:3m.v
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4.Ep=m.g.h
6.000J=m.10m/s2.12m
m=6000J/120s2
m=50kg
∆Ep=m.g.(h2-h1)
=50kg.10m/s2.8m
=4000J
5.Ek1:Ek2
½m.v:½3m.2v
½m.v:3m.v