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# Force and Motion

### A set of vocabulary words, to review the Force and Motion Unit

TermDefinition
Motion Movement of an object in relation to its surrounding
Force A push or pull acting upon an object
Balanced Forces Forces that are equal but opposite in direction; when they act on an object, they cancel each other out and no change occurs in the object's motion
Unbalanced Forces Unequal forces acting on an object; results in a change in the object's motion in the direction of the larger force
Net Force A measure of the force being exerted on an object, zero net force means an object is at rest or moving at a constant speed
Friction Force that resists the motion of an object by acting between two objects in contact with each other
Air Resistance Frictional forces placed upon an object as it moves through the air, causing it to slow down
Gravity Force that tends to pull objects toward one another
Kinetic Energy Energy an object has because of its motion
Average speed The average distance traveled
Inclined plane Simple machine that consists of a flat, sloping ramp
Simple machine A simple device, such as a lever, pulley, or inclined plane; with moving parts, makes work easier
Potential Energy Stored energy in an object
Speed Distance traveled divided by the time needed to travel that distance (S=D/T)
Work The transfer of energy
Acceleration The rate at which an object changes its velocity (increasing, decreasing, or changing speed)
Newton The SI unit for measurement of force, i.e. weight
Pulley Simple machine consisting of one or more wheels with a rope wrapped around them
Created by: mrshintze