2 practice sets · Page 1 of 1
What happens to the total energy in a closed system?
It decreases
It remains constant
It increases
It becomes zero
Correct Answer: B — It remains constant
Explanation:
Total energy remains constant in a closed system according to the law of conservation of energy.
Which of the following represents the best example of energy conservation?
A battery being charged
A pendulum swinging back and forth
Water freezing into ice
A car accelerating on a highway
Correct Answer: B — A pendulum swinging back and forth
Explanation:
A pendulum continuously converts kinetic energy into potential energy and back.
