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Forces
Term | Definition |
---|---|
Force | A push and 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 of an object when all the individual forces acting on it are added together. |
Unbalanced Forces | Forces that produce a nonzero net force, which changes an object’s motion. |
Balanced Forces | 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 | A measure of how much matter is in an object. |
Weight | A measure of the force of gravity. |
Free Fall | The motion of a falling object when the only force acting on it is gravity. |
Projectile | An object that is thrown. |
Compression | The part of a longitudinal wave where the particles of the medium are close together. |
Tension | Stress that stretches rock so that it becomes thinner in the middle. |
Air Resistance | The fluid friction experienced by objects falling through the air. |