The 4000-lb van is driven from position A to position B on the barge, which is towed at...

The 4000-lb van is driven from position A to position B on the barge, which is towed at a constant speed v₀ = 10 mi/hr. The van starts from rest relative to the barge at A, accelerates to v = 15 mi/hr relative to the barge over a distance of 80 ft, and then stops with a deceleration of the same magnitude. Determine the magnitude of the net force F between the tires of the van and the barge during this maneuver.