Question

Which object has the most kinetic energy?

A. a train that is stopped
B. a car moving at a slow speed
C. ​​a train moving at a slow speed
D. a car that is stopped at the top of a hill

Answer 1

C is the right answer because train has more mass than car

Answer 2

C

Explanation: kinetic energy means that the object is moving, automatically eliminating A and D since they are both stopped. The formula for kinetic energy is KE=1/2m(v^2) (m= mass and v= velocity). Since the train has more mass than the car, the train has more kinetic energy.