Question

When the brake of a train is applied, it slows down. Which of the following is produced?

• A. Heat into Kinetic energy
• B. Potential energy into heat
• C. Kinetic energy into heat
• D. Heat into potential energy

Answer 1

The correct option is A

Heat into Kinetic energy

A moving train has kinetic energy while in motion. When the brakes are applied, frictional force is generated between the wheels and the track, which slows down the train by converting its kinetic energy into heat energy. This follows the law which states that energy can neither be created nor destroyed but it can be transformed from one form to another.