## AQA GCSE Physics Changs in Energy

## Focus Questions

- Write down an equation to calculate the kinetic energy of a moving object.
- What is the unit of kinetic energy?
- What is the unit of mass?
- What is the unit of velocity?
- 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.
- Write down an equation to calculate the amount of elastic potential energy stored in a stretched spring.
- What are the units of elastic potential energy?
- What are the units of the spring constant?
- What are the units of extension?
- 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.
- What does the spring constant tell you about? The amount of force needed to stretch a spring by………………?
- Write down an equation to calculate the amount of gravitational potential energy gained by an object raised above ground level.
- What is the unit of mass?
- What is the unit of height?
- What is the unit of gravitational field strength?
- Rearrange the equation for mass.
- Rearrange the equation for the height
- Rearrange the equation for gravitational field strength.
- What does a gravitational field strength of 10 N/Kg mean?