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Newton’s Laws of
Motion Foldable
1)Cut and paste your foldable
like the one shown on the right.
2) Cut along the SOLID lines
only – and you will make flaps.
3) On the inside, write down
what the law states. (Add a
formula if there is one.)
4) Write down an example of a
situation that shows the law in
action.
st
Newton’s 1 Law
Newton’s 1st Law of Motion
• After the ball is kicked, what forces
are acting on it while it rolls?
• What if we could remove those forces?
What would happen then if we kicked
the ball?
GRAVITY
Friction
Newton’s
st
1
Law of Motion
• Newton’s 1st law of motion states:
An object at rest will remain at rest,
-andan object moving at a constant velocity will
continue moving at a constant velocity,
-UNLESSit is acted upon by an unbalanced force.
Newton’s
st
1
Law of Motion
BASICALLY…
Objects
resist
any
change
to
their
motion!
That’s because larger objects have more
inertia
(more resistance
a change in
This resistance
is calledto
INERTIA.
their motion)!
Which one would be easier to push?
or…
Let’s cover Newton’s 1st Law
• This law deals with situations
where forces are balanced…
• When forces are balanced,
objects resist any changes in
their motion… that’s called
INERTIA.
Newton’s 1st Law of Motion
• If no one kicks the ball, what will
happen?
• Objects at rest will remain at
rest…
Newton’s 1st Law of Motion
• If there was NO FRICTION (no
unbalanced force) to slow down
the ball, what would happen?
• Objects in motion will remain in
motion …
nd
Newton’s 2 Law
Newton’s 2nd Law of Motion
• Newton’s 2nd law of motion describes how
UNBALANCED FORCES and MASS affect
the ACCELERATION of an object.
So, how do unbalanced forces
affect an object’s motion?
• How does a batter’s swing affect the
acceleration of a baseball?
Sacrifice Bunt
Homerun Hit
So, how do unbalanced forces
affect an object’s motion?
• The harder you hit, the faster it goes!
• The greater the force, the greater the
acceleration…
Sacrifice Bunt
Homerun Hit
So, how does mass affect an
object’s motion?
• Which shopping cart would move faster
with a single push?
Empty Cart
Full Cart
So, how does mass affect an
object’s motion?
• The fuller the cart, the slower it goes!
• The more mass, the less acceleration…
Empty Cart
Full Cart
Newton’s 2nd Law of Motion
It states:
ACCELERATION depends on the
object’s MASS, and the net FORCE
acting on the object.
• We can also write it mathematically:
Force = Mass x Acceleration
rd
Newton’s 3 Law
Which forces are acting to get
this guy up in the air?
His feet push
DOWN on the
ground.
• But wait… His downward push can’t be
causing his upward motion.
Which forces are acting to get
this guy up in the air?
His feet push DOWN on
the ground.
The ground pushes UP on
the man.
• There must be a force pushing UP!
• The force of the ground pushes him UP!
Newton’s
rd
3
Law of Motion
ALL forces act in PAIRS!
Action Force: Man’s feet
push DOWN on the ground.
Reaction Force: Ground
pushes UP on the man.
• Newton’s 3rd law says that: For every action
force, there is an equal and opposite
reaction force.