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Kelas VIII
Ek = 1/2 m v^2
v^2 = 2Ek / m
v = √2Ek / m
va : vb
√2Eka / m : √2Ekb / m
√Eka : √Ekb
√9 : √16
3 : 4
vA / vB = √(EKA / EKB)
vA / vB = √[9 J / (16 J)]
vA : vB = 3 : 4