A large truck and a small car are moving at the same speed traveling up and down Hills and over bumpy roads which one has more kinetic energy?

The kinetic energy of an object is dependent on its mass and velocity. Assuming that the large truck and the small car are moving at the same speed, the object with more mass will have more kinetic energy.

Therefore, the large truck, which generally has a significantly larger mass compared to a small car, will have more kinetic energy.