Respostas

2014-04-12T14:57:14-03:00
A= v-vo / t-to 
a= 40-30 / 5 
a= 10/5
a= 2m/s² 
3 5 3
2014-04-12T14:57:28-03:00
Se a=ΔV/Δt
 ΔV=-10
Δt=5.
Logo a=-2m/s²
3 3 3