Question

Two buses are stopped side-by-side at a stoplight near the top of a hill. Bus A has a larger mass than Bus B because more people are riding on it. When the light turns green, both buses begin moving down the hill. How is energy being changed from one form to another as the bus travels downhill? If both buses are moving down the hill at the same speed, which will have more kinetic energy? Explain your response.
Please Help Mr. Sue