physical science chp. 13
Terms
undefined, object
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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