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v = 15 m/s
Ek = 225 J
ditanyakan :
m = ?
jawab :
Ek = 1/2 m v²
225 = 1/2 m 15²
450 = 225 m
m = 2 kg
v = 15 m/s
Ek = 225 J
ditanyakn : m ?
dijawab :
Ek = 1/2 x m x v²
225 = 1/2 x m x 15²
225 = 1/2 x m x 225
225 = 112,5 m
m = 225/112,5
m = 2 kg