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Forces
Term | Definition |
---|---|
Force | A push or pull |
Newton | The SI unit force is measured in |
Net Force | Combination of all forces acting on a object |
Unbalanced Forces | Cause velocity of an object to change |
Balanced Forces | Equal forces acting on one object in opposite directions |
Friction | 2 surfaces exert pressure on each other |
Static Friction | Friction that acts on objects that are not moving |
Sliding Friction | Happens when 2 solid surfaces slide over each other |
Rolling Friction | When an object rolls across a surface |
Fluid Friction | When a solid object moves through a fluid |
Gravity | A force that pulls objects towards each other. |
Mass | The measure of the amount of matter in an object |
Weight | Gravitational force exerted on an object at the surface of a planet |
Free Fall | The only force acting on an object is gravity |
Air Resistance | Acts on objects falling through air |
Projectile | An object thrown |
Compression | An elastic force that squeezes or pushes matter together |
Tension | An elastic force that stretches or pulls matter |
Inertia | The tendency of an object to resist a change in motion |
Momentum | A characteristic of a moving object that depends on both mass/velocity of an object |
Law of Conservation of Momentum | States that the absence of outside forces, the total momentum of objects that interact does not change |
Satellite | Any object that orbits another object in space |
Centripetal Force | Any force that causes an object to move in a circular path |