Three identical cars are driving along the highway when they come to a traffic jam. Car A gets stopped at the bottom of a hill. Car B stops half way down the hill. Car C is stopped at the top of the hill. Which car has the greatest potential energy and why?

Car C has the greatest potential energy. Potential energy is directly related to an object's height and mass. Since Car C is at the top of the hill, it has the highest height compared to Cars A and B. Therefore, it has the greatest potential energy.