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s=
u=0
v=40km/h (11,11m/s)
a=
t=10s
Sabemos que:
a=(v-u)/t
a=(11,11m/s-0)/10s
a=1,11m/s²
Ahora, sabemos que:
F=ma
3000N=m*1,11m/s²
3000N/1,11m/s²=m
m=2702kg