A large truck and a small car are moving at the same speed, traveling up and down hills, and over bumpy roads.

Question

Which one has more kinetic energy?
(1 point)
• The car has more kinetic energy because it moves fast down hills.
The truck has less kinetic energy
• because it has greater mass.
• The truck has more kinetic energy
because it has a greater mass.
The car and truck have the same
kinetic energy.

Answer 1

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

Kinetic energy is calculated using the formula:

$$KE=\frac{1}{2}m{v}^2$$

where $KE$ is kinetic energy, $m$ is mass, and $v$ is velocity. Since both the truck and the car are moving at the same speed, the one with the greater mass (the truck) will have more kinetic energy.

Answer 2

Answer

Answer 3

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