Final answer:
The statement is true as potential energy is converted into kinetic energy and then into heat due to tire-road friction, warming the tires and causing the bike to stop lower on the second hill than it started.
Step-by-step explanation:
The statement is true. When a cyclist coasts down one hill and up another, the potential energy at the start is converted into kinetic energy and some of this energy is, in turn, converted into heat due to friction between the bicycle tires and the road. This heat warms the tires of the bicycle. As a result, not all the original potential energy is available to be converted back into potential energy to reach the same height on the other hill, hence the bicycle stops at a point that is lower than the point where the cyclist started the coast.