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Laws of Motion Notes
Vocabulary Word
Newton’s First Law
(Inertia)
Definition
An object at rest will remain at rest unless
acted on by an unbalanced force. An object
in motion continues in motion with the
same speed and in the same direction unless
acted upon by an unbalanced force.
any ____________________ or
Force
____________________ that gives energy
to objects and causes a change in motion
Gravity
the force that ________________ objects
toward each other
Weight
the effect of _______________ on an
object's ________________
an object _____________________ under
Free Fall
the influence of __________________
(all objects in free fall accelerate at the
same rate regardless of mass-they will fall
at exactly the same rate)
an ___________________ force due to
Air Resistance
____________________
(the greater the surface area the greater the
air resistance.
a ________________ that one object puts
Friction
on another when two objects ___________
past each other
Sliding Friction
occurs when __________________
surfaces slide over each other
Rolling Friction
occurs when an object rolls over a
_________________
occurs when an object moves
Fluid Friction
_________________ a liquid or a gas
Explanation/Illustration
Vocabulary Word
Definition
Newton’s Second Law
Acceleration is produced when a force acts
on a mass. The greater the mass (of the
object being accelerated) the greater the
amount of force needed (to accelerate the
object)
A force can be measured by
What is the formula for
force?
multiplying and object's
___________________ by its
_____________.
the unit used to measure the amount of
Newtons
_________________ (named after Sir
Issac Newton)
Acceleration
a change in ______________ or velocity
(rate of acceleration is determined by the
mass of the object and the amount of force
used to move it)
Unbalanced Forces
when two objects have an
___________________ force and/or mass,
which starts a movement, stops a
movement, or changes a
direction
Balanced Forces
caused when __________________ forces
acting on one object in
__________________ directions. Balanced
forces acting on an object will
____________ change the object's motion.
Newton’s Third Law
For every action there is an equal and
opposite re-action. This means that for
every force there is a reaction force that is
equal in size, but opposite in direction.
That is to say that whenever an object
pushes another object it gets pushed back
in the opposite direction equally hard.
Explanation/Illustration