1. How can you design objects that won’t fall over?
Lesson 13/21
Stability
How can you design objects that won’t fall over?
Starter:
Which is most stable…why?

2. HOMEWORK
I will take this in next wed 27th Feb

3. Which is most stable…why?

4. Glossary
Line of Action = the line along which a force acts.

5. Look at this brick – when is it most stable?
Demo a brick
When it is stable it is in equilibrium

6. States of equilibrium (3)
Stable equilibrium
Unstable equilibrium
Neutral equilibrium

7. Will any of these topple over?!

8. If I add in the line of action of the weight3 2
If the line of action is outside the wheel base, the vehicle will topple.
How can I stop tractor 2 falling ? 1

9. 1) Lengthen the wheel base3 2 1

10. 2) Lower the centre of mass3 2
Lower the centre of mass. 1

11. 3 ….. Bolt it to the floor….. Practical?2 1

12. Complete worksheet 13.1

13. Silence task – I want to take these in to mark !