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Motion and Forces
| Term | Definition |
|---|---|
| force | a push or pull that can change the motion of an object |
| gravity | a force of attraction (pull) between any two objects in the universe |
| balanced forces | equal and opposite in direction; cause no change in motion |
| unbalanced forces | unequal and do cause a change in motion |
| net force | overall forces acting on an object |
| mass and distance | two factors that affect gravity; more mass = more gravity, closer together = stronger gravitational pull |
| magnetism | force of attraction or repulsion by magnets; N-S attract, N-N and S-S repel |
| magnetic field | invisible forces that can be seen with iron filings; show that magnets are strongest at the poles (ends) |
| motion | a change in an object's position or location |
| Newton | the unit for force; represented with an N |
| Newton's 1st Law | the law of inertia; objects in motion stay in motion and objects at rest stay at rest, unless acted upon by an outside force |
| Newton's 2nd Law | Force = mass x acceleration |
| Newton's 3rd Law | for every action there is an equal and opposite reaction |
| velocity | speed in a given direction |
| inertia | the tendency of an object to resist a change in motion; objects will keep doing what they are doing, unless acted upon by an outside force |
Created by:
koehlers
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