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A2=15 cm⇒0,15m
A1=10cm⇒0,1m
v1=9m/s
Ditanyakan: v2=?
Dijawab:
Q1=Q2
A1v1=A2v2
0,1.9=0,15.v2
0,9=0,15v2
balikan,
0,15v2=0,9
v2=0,9/0,15
v2=6 m/s
Jadi kecepatannya adalah 6 m/s