The momentum of an object is the product between the mass m of the object and its velocity:
[tex]p=mv[/tex]
The truck in our problem has momentum equal to
[tex]p=40120 kg m/s[/tex]
and a mass of
[tex]m=1180 kg[/tex]
so, if we re-arrange the previous formula, we can use these data to find the velocity of the truck:
[tex]v= \frac{p}{m}= \frac{40120 kg m/s}{1180 kg}=34 m/s [/tex]
