motion - an object’s change in position relative to a reference point, speed - the distance traveled divided by the time interval during which the motion occurred, position - the location of an object, vector - a quantity that has both size and direction, reference point - a location to which another location is compared, velocity - the speed of an object in a particular direction, acceleration - the rate at which velocity changes over time, centripetal acceleration - the acceleration directed toward the center of a circular path, force - a push or a pull exerted on an object in order to change the motion of the object , net force - the combination of all of the forces acting on an object, inertia - the tendency of an object to resist a change in motion unless an outside force acts on the object, gravity - a force of attraction between objects that is due to their masses, orbit - the path that a body follows as it travels around another body in space , free fall - the motion of a body when only the force of gravity is acting on the body, positive acceleration - an increase in velocity, negative acceleration - a decrease in velocity, gravitational force - increases as mass increases; decreases as distance increases, Newton's Laws of Motion - explains the relationship between force and motion, atmospheric pressure - the pressure caused by the weight of the atmosphere, magnitude - provides a quantitative measure of physical quantities,

Motion and Forces

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