A large truck loaded with scrap Stella weights 14 metric tons and is traveling north on the interstate heading for Chicago. It has been averaging 48km/h for the journey and has traveled over the 1450 km so far. It has just stopped to refuel. What is its current momentum?
Now that the truck, including its load of Stella, has stopped to refuel, its speed relative to the pump is zero. So its momentum, relative to the pump and everything else motionless with respect to the ground, is
