Here's why: - Kinetic energy is the energy of motion. The more mass an object has and the faster it's moving, the more kinetic energy it possesses.- A car has significantly more mass than a person or a ball. Even if the person and the ball are moving at the same speed as the car, the car will have much greater kinetic energy due to its larger mass.- The speed of the objects also matters. If the car is traveling faster than the person or the ball, its kinetic energy will be even greater.