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Motion and Force-2
Term | Definition |
---|---|
Newton's Second Law of Motion | the acceleration of an object is the same direction as the net force on the object acceleration = net force/mass |
Friction | the force that opposes the sliding motion of two surfaces that are touching each other. (think a piece of wood on sandpaper vs a piece of wood on a smooth table or surface---friction is greater with the wood and the sandpaper) |
Static friction | the frictional force that prevents two surfaces from sliding past each other. (Basically, when the friction is too great for a force to act upon an object) |
Sliding friction | the force that opposes the motion of two surfaces sliding past each other **to overcome sliding friction, a constant force must be applied to an object |
Air resistance | a "friction-like" force that opposes the motion of objects that move through the air |
Gravity | an attractive force between any two objects that depends on the masses of the objects and the distance between them. ** this force increases as the mass of either object increases, or as the objects move closer |
Weight | the gravitational force exerted on an object Weight is a FORCE Mass is a measure of the AMOUNT of matter an object contains |
acceleration due to gravity (on earth) | 9.8m/s2 |
Centripetal acceleration | acceleration toward the center of a curved or circular path |
Centripetal force | the net force exerted toward the center of a curved path Ex. gravity can be a centripetal force |
Newton's Third Law of Motion | to every action force there is an equal and opposite reaction force |
momentum | the product of an object's mass and velocity momentum=mass(kg) x velocity(m/s) p=mv |