physical science chp. 13
Terms
copy deck
 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
 actionatadistance 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
 actionreaction 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