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### 22 Cards in this Set

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 kinematics the branch of mechanics that describes how things move inertia the property of matter that causes objects to resist change in the state of motion displacement a change in position of an object weight the measure of the force of gravity on an object scalar quantities that express magnitude only terminal velocity the limit of the velocity at which an object can fall through a gas or a liquid action-at-a-distance forces forces that act on an object without touching it vectors quanitities that express magnitude and direction speed the rate at which an object changes position mechanics the study of motion magnitude as a part of velocity which describes size and direction average speed distance divided by time equals speed or velocity V = d/t acceleration the rate at which velocity increases in a given amount of time frame of reference A system of reference points from which the position and motion of an object can be determined action-reaction principle Newton's third law of motion- For every action there is an equal and opposite reaction geostationary orbit when a satellite orbits at the same period as the surface of the earth below dynamics the branch of mechanics that describes why things velocity (V) the rate at which an object changes position in a specified direction Universal Law of Gravitation gravitational forces are directly related to the mass of an object satellites celestial bodies in orbit around another celestial body either natural or manmade gravity (g) the attraction that any object in the universe has toward other objects in the universe newton (N) the metric unit of weight