1. A car of mass M pulls a trailer of mass m along a straight level road at constant speed. The car experiences a resistance to motion of 5000 N and the trailer feels a resistance to motion of 1000 N. (i) Draw diagrams showing all of the forces acting on the car and on the trailer.
(ii) By considering the forces on the whole system of car and trailer, find the
driving force in the engine.
(iii) By considering the forces on the trailer only, find the tension in the towbar.

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below: