Final answer:
The kinetic energy of a train and a car traveling at the same speed of 60 miles per hour would differ due to differences in mass; the train, having a much larger mass, would have a greater kinetic energy than the car.
Step-by-step explanation:
If both a train and a car are traveling at 60 miles per hour, and we are to compare their kinetic energy, we must consider the definition of kinetic energy. Kinetic energy (KE) is given by the equation KE = (1/2)mv², where m is the mass of the object and v is its velocity. Since the velocity is the same for both vehicles, the vehicle with the greater mass will have greater kinetic energy. Therefore, assuming the train has a significantly larger mass than the car, the train will have a higher kinetic energy compared to the car at the same speed.
For example, if a 1,500 kg car is moving at 30 m/s (approximately 67.1 miles per hour), it has a kinetic energy of around 675 kJ. The train, likely having a mass tens or hundreds of times larger than the car, would have a proportionally higher amount of kinetic energy due to its greater mass, even though both are moving at the same speed (60 miles per hour).