Energy Conservation Quiz

1. What is the law of conservation of energy?

Energy can be created but not destroyed Energy cannot be created or destroyed, only transformed Energy disappears when we use it

2. In a swinging pendulum, when is the kinetic energy greatest?

At the highest point of the swing At the lowest point of the swing Halfway between the highest and lowest points

3. What happens to the total energy of a pendulum as it swings (ignoring friction)?

It increases It decreases It remains constant

4. Which formula calculates potential energy?

PE = m × v PE = m × g × h PE = ½ × m × v²

5. What type of energy does a pendulum have at its highest point?

Only kinetic energy Only potential energy Both kinetic and potential energy

6. If you increase the length of a pendulum, what happens to its swing?

It swings faster It swings slower The speed doesn't change

7. What happens to the energy of a real pendulum over time?

It stays exactly the same It gradually decreases due to air resistance It increases as it keeps swinging

8. Which of these is an example of energy transformation?

A battery powering a flashlight A swinging pendulum All of the above

9. What happens to the potential energy of a pendulum as it falls?

It increases It decreases It stays the same

10. If a pendulum has 10J of total energy, and 3J of kinetic energy, how much potential energy does it have?

3J 7J 13J

Test Your Knowledge About Energy Conservation