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15 terms

Motion

STUDY
PLAY
force
a push or pull
gravity
force of attraction between objects due to mass
friction
force opposing motion between touching surfaces
velocity
speed in a particular direction
static
friction that disappears when an object starts moving
acceleration
rate at which velocity changes
motion
changing postion over time
speed
rate at which an object moves
balanced
forces producing a net force of zero
net force
result of combined forces on an object
weight
measure of the force of gravity on an object
mass
amount of matter in an object
rolling
friction between wheels and the floor
newton
unit used to express force
sliding
kinetic friction that makes brakes work