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Forces and Energy/2/
Forces and Energy Ch.2, Lessons 1-5
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. |
Friction | The forces that two surfaces exert on each other when they rub against each other. |
Sliding friction | Friction that occurs when one solid surface slides over another. |
Static friction | Friction that acts between objects that are not moving. |
Fluid friction | Friction that occurs as an object moves through a fluid. |
Rolling friction | Friction that occurs when an object rolls over a surface. |
Gravity | The attractive force between objects; the force that moves objects downhill. |
Mass | The amount of matter in an object. |
Weight | A measure of the force of gravity acting on an object. |
Inertia | The tendency of an object to resist a change in motion. |
Momentum | The product of an object's mass and velocity. |
Law of conservation of momentum | The rule that in the absence of outside forces the total momentum of objects that interact does not change. |
Free fall | The motion of a falling object when the only force acting on it is gravity. |
Satellite | Any object that orbits around another object in space. |
Centripetal force | A force that causes an object to move in a circle. |