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# Forces

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### Forces

1. 1. Forces and Balance<br />
2. 2. What is a force? <br />It is a push or pull<br />
3. 3. There are 4 major types of unseen forces:<br />
4. 4. 1. Gravity<br />Gravity on <br /> Earth = 9.8 m/s2<br />
5. 5. 2. Magnetic <br />
6. 6. 3. Weak Nuclear <br />
7. 7. 4. Strong Nuclear<br />
8. 8. There are 6 contact forces:<br />
9. 9. 1. Friction <br />
10. 10. 2. Tension <br />
11. 11. 3. Normal <br />
12. 12. 4. Air Resistance<br />
13. 13. 5. Applied <br />
14. 14. 6. Spring<br />
15. 15. All forces are either:<br />1. Balanced: Not moving<br />2. Unbalanced: Moving<br />
16. 16. Name the forces!<br />
17. 17. Newton’s 2nd Law<br />Acceleration of an object is in the same direction as the net force on an object.<br />F = MA<br />
18. 18. Newton’s 3rd Law<br />For every action force there is an equal and opposite reaction force.<br />