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Force, Friction
Science 7th Grade
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 per second |
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 acting 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 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 and object at the surface of 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 a falling object can achieve |