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Forces Motion Laws
Forces and the Laws of Motion
Term | Definition |
---|---|
Force | a push or a pull in a certain direction |
Inertia | resistance to change in motion |
Contact Force | force that is effective only if direct contact is made |
Field Force | force that can be felt from a distance |
Free Body Diagram | diagram that shows all of the forces on a body |
Net External Force | the sum of forces on an axis |
Action Reaction pair | two equal and opposite forces on a pair of objects |
Equilibrium | an object who's net force is zero, or all forces on the object are balanced. The object is not accelerating. |
Mass | the amount of stuff that makes up an object |
Weight | a measure of the force of gravity |
Friction | force resulting from movement across a surface or through a fluid. |
Normal | surface force that is perpendicular to the surface |
Coefficient of Friction | a constant that depends only on the roughness of the surface |
Law of Inertia | an object at rest will stay at rest or an object in motion will stay in motion in a straight line until an unbalanced force acts on it |
Newton's 2nd Law | acceleration is affected by an object's mass and the force acting on it |
Newton's 3rd Law | for every action force, there is an equal and opposite reaction force |