# Resources

The specification is a good place to start. Page 47 for this one. https://filestore.aqa.org.uk/resources/physics/specifications/AQA-8463-SP-2016.PDF

The BBC Bitesize website is also helpful for diagrams and graphs and clear explanations. https://www.bbc.co.uk/bitesize/guides/z9hk3k7/revision/1

# Questions

- Draw a force diagram showing two forces compressing, bending and stretching a spring.
- Why do we need more than one force to change the shape of an object e.g stretching, compressing or bending the object?
- What is the difference between elastic deformation and inelastic deformation caused by stretching forces?
- Springs: What is the mathematical relationship between the force applied on a spring and extension?
- Make sure that you learn this equation.
- What are the units of force?
- What are the units of extension?
- What are the units of spring constant?
- Can you explain what the spring constant tells you about?
- Can the ‘e’ in the equation also be how much the object has been compressed by?
- Copy the paragraph below filling in the gaps. The specification will help you with this.

*A force that stretches (or compresses) a spring does _________ and ________________ is stored in the spring. Provided the spring is not ____________ deformed, the work done on the spring and the elastic potential energy stored are_________.*

- What is the difference between a linear and non-linear relationship between force and extension?
- How can the spring constant be calculated from a force-extension graph? Force on the y axis and extension on the x-axis.
- Can you rearrange this equation?
- Rearrange the equation for k.
- Rearrange the equation for e. This involves a square root.