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Science Chapter 13

Terms

undefined, object
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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

Deck Info

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