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Force,Friction,Grav
Term | Definition |
---|---|
Force | a push or pull exerted on an object |
Newton | a unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second. (4.5 N = 1 lb) |
Net force | the overall force on an object when all the individual forces acting on it are added together |
Unbalanced Force | forces that produce a nonzero net force, which changes an object's motion |
Balanced Force | equal forces actin on an object in opposite directions |
Friction | the force that one surface exerts on another when the two surfaces rub against each other |
Static Friction | friction that acts on objects that are not moving |
Sliding Friction | friction that occurs when one solid surface slides over another |
Rolling Friction | friction that occurs when an object rolls over a surface |
Fluid Friction | friction that occurs as a an object moves through a fluid |
Gravity | the force that pulls objects toward each other |
Mass | the amount of matter in an object |
Weight | the force of gravity on an object at the surface on a planet |
Free Fall | the motion of a falling object when the only force acting on it is gravity |
Air Resistance | the fluid friction experienced by objects falling through the air |
Terminal Velocity | the greatest velocity of a falling object can achieve |