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Newton’s Laws of Newton’s Laws of MotionMotion
Concept MapConcept Map
Use Math to Describe Motion
Use Math to Describe Motion
Explain why objects move the way they do
Use Math to Describe Motion
Explain why objects move the way they do
EXAMPLE: Quarterbacks use the laws of motion when they throw a football
Use Math to Describe Motion
Explain why objects move the way they do
EXAMPLE: Quarterbacks use the laws of motion when they throw a football
Predict where an object will go next
Use Math to Describe Motion
Explain why objects move the way they do
EXAMPLE: Quarterbacks use the laws of motion when they throw a football
Predict where an object will go next
EXAMPLE: NASA uses the laws of motion to predict the path the asteroids in our solar system will take
Use Math to Describe Motion
Explain why objects move the way they do
EXAMPLE: Quarterbacks use the laws of motion when they throw a football
Predict where an object will go next
EXAMPLE: NASA uses the laws of motion to predict the path the asteroids in our solar system will take
Determine how an object’s motion can be changed
Use Math to Describe Motion
Explain why objects move the way they do
EXAMPLE: Quarterbacks use the laws of motion when they throw a football
Predict where an object will go next
EXAMPLE: NASA uses the laws of motion to predict the path the asteroids in our solar system will take
Determine how an object’s motion can be changed
EXAMPLE: Engineers use the laws of motion when designing the safety equipment in our cars
Use Math to Describe Motion
Explain why objects move the way they do
EXAMPLE: Quarterbacks use the laws of motion when they throw a football
Predict where an object will go next
EXAMPLE: NASA uses the laws of motion to predict the path the asteroids in our solar system will take
Determine how an object’s motion can be changed
EXAMPLE: Engineers use the laws of motion when designing the safety equipment in our cars
Determine where objects started from and the path they took to reach their final location
Use Math to Describe Motion
Explain why objects move the way they do
EXAMPLE: Quarterbacks use the laws of motion when they throw a football
Predict where an object will go next
EXAMPLE: NASA uses the laws of motion to predict the path the asteroids in our solar system will take
Determine how an object’s motion can be changed
EXAMPLE: Engineers use the laws of motion when designing the safety equipment in our cars
Determine where objects started from and the path they took to reach their final location
EXAMPLE: Forensic scientists use the laws of motion to trace the pathways of bullets while solving murders
Wrap-Up #1Wrap-Up #1
►Describe one real-Describe one real-life situation in life situation in which a person which a person might use the laws might use the laws of motion. Do not of motion. Do not use any of the use any of the examples given examples given already!already!
Newton’s Laws of Motion
Newton’s Laws of Motion
1st Law
An object at rest will remain at rest and an object in motion will remain in motion at a constant velocity unless acted upon by unbalanced forces
Newton’s Laws of Motion
1st Law
Inertia: resistance to change in motion
Newton’s Laws of Motion
1st Law
Inertia: resistance to change in motion
AKA: momentum p
= m * v
Newton’s Laws of Motion
1st Law
Inertia: resistance to change in motion
AKA: momentum p
= m * v
Forces
Forces are balanced
when they cancel each
other out
Newton’s Laws of Motion
1st Law
Inertia: resistance to change in motion
AKA: momentum p
= m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel
each other out
Wrap-Up #2Wrap-Up #2
► For each of the following For each of the following situations, determine if situations, determine if the forces are balanced the forces are balanced or unbalanced:or unbalanced: A snow skier is speeding A snow skier is speeding
down a mountain, going down a mountain, going faster and fasterfaster and faster
A snow skier is being A snow skier is being carried up the mountain carried up the mountain by the lift. The lift moves by the lift. The lift moves at a constant speed.at a constant speed.
Wrap-Up #2: AnswersWrap-Up #2: Answers
► For each of the following situations, For each of the following situations, determine if the forces are balanced or determine if the forces are balanced or unbalanced:unbalanced: A snow skier is speeding down a mountain, A snow skier is speeding down a mountain,
going faster and fastergoing faster and faster►Unbalanced – the skier is speeding up; acceleration Unbalanced – the skier is speeding up; acceleration
requires unbalanced forcesrequires unbalanced forces
A snow skier is being carried up the mountain A snow skier is being carried up the mountain by the lift. The lift moves at a constant speed.by the lift. The lift moves at a constant speed.►Balanced – constant speed means no accelerationBalanced – constant speed means no acceleration
Newton’s Laws of Motion
1st Law
Inertia: resistance to change in motion
AKA: momentum p
= m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel
each other outCommon
forces are present all around us
Normal force
Gravity
Friction
Newton’s Laws of Motion
2nd Law
Force is equal to the product of mass and acceleration
amF
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Normal force
Gravity
Friction
Newton’s Laws of Motion
2nd Law
Bigger forces
cause more acceleratio
n
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Normal force
Gravity
Friction
Newton’s Laws of Motion
2nd Law
Bigger forces
cause more acceleratio
n
Baseball- bunt it and it has
low acceleration; really whack it and it has
high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Normal force
Gravity
Friction
Newton’s Laws of Motion
2nd Law
Bigger forces
cause more acceleratio
nRace car –
barely push the pedal and
it has low acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Newton’s Laws of Motion
2nd Law
Bigger forces cause more
acceleration
Race car – barely push
the pedal and it has low
acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Different masses
have different
accelerations
Newton’s Laws of Motion
2nd Law
Bigger forces cause more
acceleration
Race car – barely push
the pedal and it has low
acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Different masses
have different
accelerations
When a bug hits a windshield it goes
splat. The windshield doesn’t have much
acceleration from the impact with the bug.
Newton’s Laws of Motion
2nd Law
Bigger forces cause more
acceleration
Race car – barely push
the pedal and it has low
acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Different masses
have different
accelerations
When a bug hits a windshield it goes
splat. The windshield doesn’t
have much acceleration from
the impact with the bug.
3rd Law
For every action there is an equal and opposite reaction
Newton’s Laws of Motion
2nd Law
Bigger forces cause more
acceleration
Race car – barely push
the pedal and it has low
acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Different masses
have different
accelerations
When a bug hits a windshield it goes
splat. The windshield doesn’t
have much acceleration from
the impact with the bug.
3rd Law
Force has direction, so
opposite means it goes the other
direction
Newton’s Laws of Motion
2nd Law
Bigger forces cause more
acceleration
Race car – barely push
the pedal and it has low
acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Different masses
have different
accelerations
When a bug hits a windshield it goes
splat. The windshield doesn’t
have much acceleration from
the impact with the bug.
3rd Law
Force has direction, so
opposite means it goes the other
direction
The action and reaction forces are applied to different
objects
Newton’s Laws of Motion
2nd Law
Bigger forces cause more
acceleration
Race car – barely push
the pedal and it has low
acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Different masses
have different
accelerations
When a bug hits a windshield it goes
splat. The windshield doesn’t
have much acceleration from
the impact with the bug.
3rd Law
Force has direction, so
opposite means it goes the other
direction
The action and reaction forces are applied to different
objects
Gravity
A: Earth pulls you down
R: you pull Earth up
Newton’s Laws of Motion
2nd Law
Bigger forces cause more
acceleration
Race car – barely push
the pedal and it has low
acceleration; stomp down
and it has high acceleration
Baseball- bunt it and it has
low acceleration;
really whack it and it has high acceleration
1st Law
Inertia: resistance to change in motion
AKA: momentum p = m * v
Forces
Forces are balanced
when they cancel each
other out
Forces are unbalanced when they
do not cancel each
other outCommon forces are present all around us
Gravity
Friction
Normal force
Different masses
have different
accelerations
When a bug hits a windshield it goes
splat. The windshield doesn’t
have much acceleration from
the impact with the bug.
3rd Law
Force has direction, so
opposite means it goes the other
direction
The action and reaction forces are applied to different
objects
Gravity
A: Earth pulls you down
R: you pull Earth up
Space Ship
A: ship pushes gas down
R: gas pushes ship up
Wrap-Up #3Wrap-Up #3
►Dave and Bob are Dave and Bob are pushing against pushing against each other. If the each other. If the action force is Dave action force is Dave pushing Bob to the pushing Bob to the left, what is the left, what is the reaction force?reaction force?
Wrap-Up #3: AnswerWrap-Up #3: Answer
►Dave and Bob are Dave and Bob are pushing against pushing against each other. If the each other. If the action force is Dave action force is Dave pushing Bob to the pushing Bob to the left, what is the left, what is the reaction force?reaction force? Bob pushing Dave to Bob pushing Dave to
the rightthe right
