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# Motion and Force-2

TermDefinition
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
Created by: akley