Question In the design of a roller coaster, is it possible for any hill of the ride to be higher than the first one? If it is not possible, give the reason. If it is possible, how is it done? Attempts It is possible. Says we make the second hills higher than the first one, we can achieve this by providing more kinetic energy when the roller coaster cross the first hill, and hence the kinetic energy plus the potential energy of the first hill, will make the roller coaster pass through the higher second hill with less kinetic energy. Is it correct? If no, what is the better answer?