# AQA GCSE Physics Changes in Energy Specification Focus Questions

## Focus Questions

1. Write down an equation to calculate the kinetic energy of a moving object.
2. What is the unit of kinetic energy?
3. What is the unit of mass?
4. What is the unit of velocity?
5. Rearrange this equation so that mass and velocity are the subject of the equation. E.g. mass =, velocity =. The velocity one must include a square root.
6. Write down an equation to calculate the amount of elastic potential energy stored in a stretched spring.
7. What are the units of elastic potential energy?
8. What are the units of the spring constant?
9. What are the units of extension?
10. Rearrange this equation so that spring constant and extension are the subject of the equation. E.g. k = , e =. For extension, you will have to include a square root.
11. What does the spring constant tell you about? The amount of force needed to stretch a spring by………………?
12. Write down an equation to calculate the amount of gravitational potential energy gained by an object raised above ground level.
13. What is the unit of mass?
14. What is the unit of height?
15. What is the unit of gravitational field strength?
16. Rearrange the equation for mass.
17. Rearrange the equation for the height
18. Rearrange the equation for gravitational field strength.
19. What does a gravitational field strength of 10 N/Kg mean?