Science Chapter 13
Terms
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- Universal Law of Gravitation
- gravitational forces are directly related to the mass of an object
- vectors
- quantities of an objects speed and direction
- velocity (v)
- average speed of an object
- geostationary orbit
- an object circling the earth at the same period as the surface of the earth below
- mechanics
- modern study of motion
- kinematics
- description of HOW things move
- magnitude
- size of an object
- scalars
- quantities that express magnitude only, such as speed and distance
- frame of reference
- a group of landmarks
- inertia
- Newton's first law of motion
- dynamics
- description of WHY things move
- weight (w)
- strength of gravities pull
- displacement
- change in position of an object
- acceleration
- description of how speed changes over time
- speed
- displacement overa given time interval
- terminal velocity
- the highest velocity at which an object can fall
- action-at-a-distance forces
- the greater the attraction to Earth's surface
- gravity (g)
- attraction to the earth's surface
- newton (n)
- name for the unit of force, equal to 1 kilogram-meter/second squared
- action-reaction principle
- Newton's third law of motion
- satellites
- celestial bodies in orbit around another celestial body
- average speed
- velocity