A36,287 kg truck has a momentum of 907,175 kg • . what is the truck’s velocity

Momentum = (mass) x (speed) .

So 907,175 kg-m/s = (36,287 kg) x (speed)

Divide each side by (36,287 kg):

Speed = (907,175 kg-m/s) / (36,287 kg)

Speed = 25 m/s

That's the truck's speed. We can't do anything that involves the truck's velocity, because we don't know what direction the truck is moving.  

object 2 because all the other ones are wrong

gas and liquid