Download Unit 3 Vocabulary words

Chapter 23 Science Vocabulary
Acceleration - change in velocity divided by the amount of time needed for that change to take place; occurs when an
object speeds up, slows down, or changes direction
Balanced forces – forces that are equal but opposite in direction; when they act on an object, they cancel each other
out, and no change occurs in the object’s motion.
Displacement – distance and direction from a starting point to an ending point
First law of motion – states that an object will remain at rest or move in a straight line at a constant speed unless it is
acted upon by a force
Force – push or a pull; has a size and direction
Friction – force between two surfaces in contact that resists the sliding of the surfaces past each other.
Gravitational force – force that every object exerts on every other object; depends on the masses of the objects and the
distance between them.
Second law of motion – states that an object acted on by an unbalanced force will accelerate in the direction of the force
with an acceleration equal to the force divided by the object’s mass.
Speed – equals the distance traveled divided by the time needed to travel that distance.
Third law of motion – states that forces act in equal but opposite pairs.
unbalanced forces – unequal forces that do not cancel when acting on an object and cause a change in the object’s
motion.
Velocity – speed and direction of a moving body/ average velocity equals the displacement divided by the time.
Chapter 23 Newton’s Laws of Motion Vocabulary
WORD
DEFINITION
push or a pull; has a size and
direction
states that forces act in equal
but opposite pairs
change in velocity divided by the
amount of time needed for that
change to take place; occurs
when an object speeds up, slows
down, or changes direction
force that every object exerts on
every other object; depends on
the masses of the objects and
the distance between them.
unequal forces that do not
cancel when acting on an object
and cause a change in the
object’s motion
distance and direction from a
starting point to an ending point
speed and direction of a moving
body/ average velocity equals
the displacement divided by the
time
states that an object will remain
at rest or move in a straight line
at a constant speed unless it is
acted upon by a force
states that an object acted on by
an unbalanced force will
accelerate in the direction of the
force with an acceleration equal
to the force divided by the
object’s mass
forces that are equal but
opposite in direction; when they
act on an object, they cancel
each other out, and no change
occurs in the object’s motion.
equals the distance traveled
divided by the time needed to
travel that distance
force between two surfaces in
contact that resists the sliding of
the surfaces past each other
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