Resposta :
X/t1=90 t1=x/90
X/t2=60 t2=x/60
Vm=ΔS/Δt
Vm=2x/(x/90+x/60)
Vm=2x/(5x/180)
Vm=2x.180/5x
Vm=2.180/5
Vm=72 m/s
X/t2=60 t2=x/60
Vm=ΔS/Δt
Vm=2x/(x/90+x/60)
Vm=2x/(5x/180)
Vm=2x.180/5x
Vm=2.180/5
Vm=72 m/s