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Ea=Eb
mA=3kg
VA=2m/s
VB=6m/s
Szukane:
mB=?
Wzory:
Ek=1/2m*V2
Rozwiązanie:
Ea=1/2*3kg*(2m/s)2
Ea=1,5kg*4m2/s2=6 J
Eb=Ea
Eb=6J
Eb=1/2mV2
2Eb=mV2
2Eb/V2=m
m=2Eb/V2
m=2*6J/(6m/s)2
m=12J/36m2/s2
m=1/3 kg