click below
click below
Normal Size Small Size show me how
Ch. 10 Forces Review
Term | Definition |
---|---|
Force | A push or pull |
Newtons | The units force is measured in |
Friction | A force that opposes motion |
Balanced Forces | Sum of the forces is zero. |
Unbalanced Forces | Always produce a change in motion |
Newton's First Law | An object at rest(or in motion) will stay at rest (or in motion) unless acted on by an unbalanced force |
Inertia | Objects resist any changes in their motion |
Mass | Measured in grams (or kilograms). Mass doesn't change. |
Weight | Pull of gravity. Measured in Newtons. Changes depending on your location. |
Newton's Second Law | Force = Mass(Acceleration) F = M(A) |
Newton's Third Law | For every action, there's an equal and opposite reaction. |
Ways To Reduce Friction | ball bearings, lubricants, sanding surfaces |
Static Friction | Friction between two objects that are touching but not moving. Takes the most force to overcome. |
Sliding Friction | Friction between two objects that are sliding against each other. |
Rolling Friction | Friction that occurs when one surfaces rolls over another. |
Fluid Friction | Occurs when an object moves through a fluid like air or water. |
Gravity | Depends on masses of objects attracted to each other and how far away they are from each other. |