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m1=25kg
m2=4kg
v1=10m/s
Ditanyakan:v2=?
Dijawab:
Ek1=Ek2
1/2mv1²=1/2mv2² ⇒coret 1/2
m1v1²=m2v2²
25.10²=4.v2²
250=4v2²
625=v2²
√625=v2
25 m/s=v2
Kecepatan benda ke2 =25 m/s