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400 = 2 kg . h . 10
400 = h. 20
h = 400/20
h =20 m
g = 10 m/s²
Ep = 400 J
Dit : h ?
Jwb :
h = Ep / m.g
= 400 J / 2 kg . 10 m/s²
= 20 m
maaf ya kalau salah