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? (1 point)

The car has more kinetic energy because it moves fast down hills.
The truck has more kinetic energy because it has a greater mass.
The car and truck have the same kinetic energy.
The truck has less kinetic energy because it has greater mass.

1 answer

The correct answer is: The truck has more kinetic energy because it has a greater mass.

Kinetic energy is calculated using the formula:

\[ KE = \frac{1}{2}mv^2 \]

where \( KE \) is the kinetic energy, \( m \) is the mass, and \( v \) is the speed. Since both the truck and the car are moving at the same speed, the truck, having a greater mass, will have more kinetic energy.