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Force & Motion
8th Grade Physical science
Term | Definition |
---|---|
Force | A push or pull causing an object to change its speed or direction. |
Contact Force | A force exerted during contact between objects. |
Static Friction | The fore that resists the start of sliding motion between two surfaces that are touching. |
Kinetic Friction | The force that resists the movement of two surfaces that are touching AND are moving relative to each other. |
Drag | A friction-like force that opposes (resists) the motion of an object in fluid or air. |
Non Contact Force | A force exerted on objects that are not in contact (touching). |
Net Force | The combination of all the forces acting on an object. |
Balanced Forces | When net forces acting on a object equal 0 (zero) Newtons. Balanced forces will not cause a change in the motion of a moving object, and objects at rest will remain at rest. |
Unbalanced Forces | When the net force acting on a object is greater than (>) 0 (zero) Newtons. Unbalanced forces cause a change in the object's motion. |