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• HKE
m = 5 kg
GJB
g = 10 m/s²
h = 3 m
Menurut HKE, Ek benda ketika tiba di tanah sana dengan Ep benda itu ketija dijatuhkan.
Ek = Ep
Ek = m g h
Ek = (5) (10) (3)
Ek = 150 J ← jwb
m = 5kg
h =3m
Ek..?
Hukum kekekalan energi
mgh = 1/2mv^2
5.10.3= EK
EK = 150 joule