Respostas

2013-08-25T15:16:54-03:00
Vm=Δs/Δt

1º) Vm=24,60m/20s=1,23m/s
2º) Vm=48cm/20s=2,4 cm/s  ou  Vm=0,48m/20s=0.024m/s
3º) Vm=52,60m/20s=2,63m/s

espero ter ajudado! :)