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Chapter 1b
1.4, 1.5, & Forces, Mass, and Momentum
Term | Definition |
---|---|
Friction | The force that two surfaces exert on each other when they rub against each other. |
Sliding Friction | When two solid surfaces slide over each other. |
Static Friction | Between two objects that are not moving. |
Fluid Friction | When a solid object moves through a fluid. |
Rolling Friction | When an object rolls across a surface. |
Gravity | A force that pulls objects toward each other. |
Mass | The measure of the amount of matter in an object. |
Weight | A measure of the force of gravity on an object. |
Inertia | Resistance to change in motion. |
Momentum | The quantity of motion of a moving body, measured as a product of its mass and velocity. |
Newton's First Law of Motion | An object at rest will remain at rest unless acted upon by a nonzero net force. An object in motion at a constant velocity will remain in motion unless acted upon by a nonzero net force. |
Newton's Second Law of Motion | An object's acceleration depends on its mass and the net force acting on it. |
Newton's Third Law of Motion | If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object. |