4.1 Newton's Laws of Motion
Force
Force – A push or a pull on one object by another object.
Contact Force – A force resulting from physical contact between two objects
Field Force – A force that is not mediated through physical contact
| FUNDAMENTAL FORCES | ||||
|---|---|---|---|---|
| 1. Strong Nuclear Force |  | |||
| 2. Electromagnetic Force | ||||
| 3. Weak Nuclear Force | ||||
| 4. Gravity | ||||
| NEWTON’S LAWS OF MOTION | |
|---|---|
| 1st Law | If ∑F = 0, then v = constant Law of Intertia An object’s velocity remains constant unless a net force is acting upon it. |
| 2nd Law | ∑F = ma SI Unit for mass: kg SI Unit for Force: N = kg•m/s2 |
| 3rd Law | F1→2 = -F2→1 For every force exerted by one object on a second object, there is an equal but opposite (equal in magnitude but opposite in direction) force by the second object on the first. |