1. Forces and Balance

2. What is a force? It is a push or pull

3. There are 4 major types of unseen forces:

4. 1. Gravity Gravity on Earth = 9.8 m/s2

5. 2. Magnetic

6. 3. Weak Nuclear

7. 4. Strong Nuclear

8. There are 6 contact forces:

9. 1. Friction

10. 2. Tension

11. 3. Normal

12. 4. Air Resistance

13. 5. Applied

14. 6. Spring

15. All forces are either: 1. Balanced: Not moving 2. Unbalanced: Moving

16. Name the forces!

17. Newton’s 2nd Law Acceleration of an object is in the same direction as the net force on an object. F = MA

18. Newton’s 3rd Law For every action force there is an equal and opposite reaction force.