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Transcript 
Motion & Forces
Vocabulary
Match the words to the correct definition.
gravity
a force of attraction between objects
due to their masses
acceleration
a change in speed (velocity) or
direction
friction
a force that opposes motion between
two objects that are in contact
inertia
the tendency of an object to resistance
a change in motion
force
a push or a pull
(includes size and direction)
work
the result of a force moving an object
(force and motion are same directio)
mass
a measure of the amount of matter in
an object
speed
the rate of motion (distance ÷ time)
net force
combination of all the forces acting on
an object
velocity
the speed of an object in a particular
direction
motion
an object’s change in position
weight
the pull of gravity on an object
newton
the unit for force
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