Welcome to the module Force and Work.

At the end of this module you should:
1. Understand force and know that the newton (N) is the unit of force. 
3. Understand friction and the effect of lubrication. 
4. Understand the relationship between the extension of a spring and applied force. 
5. Understand that weight is the force of gravity and that it varies with location. 
6. Understand the unit of work.