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Forces
Term | Definition |
---|---|
Force | A push or a pull |
Newton | The SI unit of magnitude,or strength, of force |
Net Force | The combination of all forces acting on an object |
Unbalanced Forces | Cause the velocity of an object to change |
Balanced Forces | Equal forces acting on one object in opposite directions |
Friction | A force that two surfaces exert on each other when they rub against each other. |
Static Friction | Friction that acts on objects that are not moving. |
Sliding Friction | When two 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 toward each other. |
Mass | The measure of the amount of matter in an object. |
Weight | The gravitational force exerted on a person or object at the surface of a planet. |
Free Fall | When the only force acting on an object is gravity. |
Air Resistance | A type of fluid friction that acts on objects falling through air. |
Projectile | An object that is 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 depend on both the mass and the velocity of the object. |
Law of Conservation of Momentum | States that in 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. |