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h= 6 m
t= 5 sekon
m= 800 kg
g= 10 m/s²
ditanya
P=...?
jawab
⇒Ep = W
W= m.g.h
W= (800)(10)(6)
W= 48.000 J
P= W/t
P= 48.000 J/5 s
P= 9.600 wat (A)