Levers

- Before you go any further(Introduction)
- Describing turning events – close that door!(Exposition)
- Levers everywhere(Exposition)
- The forces acting on levers(Exposition)
- Trading force and distance(Exposition)
- Designing levers – turning effects and moments(Exposition)
- Lifting things with levers(Expansion – lead me deeper)
- Starting out on calculations(Exposition)
- Thinking more widely – bent levers(Expansion – tell me more)
- Various terms used for the turning effect of forces(Expansion – tell me more)
- Screwdrivers are used for many things – be careful!(Exposition)
- Stability and toppling(Expansion – tell me more)
- Describing and using levers(Summary)

Hydraulic levers

- Swimming(Introduction)
- Force is determined by pressure and area(Exposition)
- Not too deep!(Exposition)
- Not just liquids but gases too!(Exposition)
- Increasing pressure and exerting force(Exposition)
- Using fluid pressure to move the Earth(Exposition)
- Simple hydraulic machines – how do they work?(Exposition)
- Matching hydraulic systems to levers(Expansion – tell me more)
- Selecting hydraulic fluids(Expansion – lead me deeper)
- Moving fluid – predicting distances travelled by the pistons(Expansion – tell me more)
- Tell me more – the same argument with a few equations(Expansion – lead me deeper)
- Conservation of energy – predicting the forces produced at each piston(Expansion – tell me more)
- But what exactly is pressure? Thinking about particles(Expansion – tell me more)
- But what about solids? Pressure and stress(Exposition)
- Describing and using hydraulic machines(Summary)

Pressing numbers on the keyboard whilst the diagram has focus (click on it) will select parts. 0 will show the whole diagram again.

Pressing numbers on the keyboard whilst the diagram has focus (click on it) will select parts. 0 will show the whole diagram again.

Using the popular right lines / wrong track format from Supporting Physics Teaching.