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Ek= 40 joule
m= 4 kg
Dit:
v=..?
Penye:
v²= Ek/(1/2.m)
v²= 40/(1/2×4)
v²= 40/2
v²= 20
v= √20
v= 4,47 m/s
Maaf bila salah, soalnya kurang detail.