Transcript Newton`s Laws of Motion

Newton’s Laws of Motion
Concept 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
Determine where objects
started from and the path they
took to reach their final location
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 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
Determine how an
object’s motion can be
changed
EXAMPLE: Engineers use the laws
of motion when designing the
safety equipment in our cars
Wrap-Up #1
► Describe
one real-life
situation in which a
person might use the
laws of motion. Do
not use any of the
examples given
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
Inertia: resistance to
change in motion
1st Law
AKA: momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Newton’s Laws of Motion
AKA: momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Newton’s Laws of Motion
AKA: momentum
p=m*v
Newton’s Laws of Motion
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Forces are
unbalanced
when they
do not
cancel each
other out
Wrap-Up #2
► For
each of the following
situations, determine if the
forces are balanced or
unbalanced:
 A snow skier is speeding
down a mountain, going
faster and faster
 A snow skier is being carried
up the mountain by the lift.
The lift moves at a constant
speed.
Wrap-Up #2: Answers
► For
each of the following situations, determine
if the forces are balanced or unbalanced:
 A snow skier is speeding down a mountain, going
faster and faster
► Unbalanced
– the skier is speeding up; acceleration requires
unbalanced forces
 A snow skier is being carried up the mountain by the
lift. The lift moves at a constant speed.
► Balanced
– constant speed means no acceleration
AKA: momentum
p=m*v
Newton’s Laws of Motion
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Common
forces are
present all
around us
Normal force
Friction
Gravity
Forces are
unbalanced
when they
do not
cancel each
other out
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Common
forces are
present all
around us
Normal force
Friction
Gravity
2nd Law
Forces are
unbalanced
when they do
not cancel
each other
out
Force is equal to the
product of mass and
acceleration
F  m a
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Common
forces are
present all
around us
Normal force
Friction
Gravity
2nd Law
Forces are
unbalanced
when they do
not cancel
each other
out
Bigger forces
cause more
acceleration
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
2nd Law
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Bigger forces
cause more
acceleration
Normal force
Friction
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
2nd Law
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Bigger forces
cause more
acceleration
Race car –
barely push the
pedal and it has
low acceleration;
stomp down and
it has high
acceleration
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
2nd Law
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Bigger
forces
cause more
acceleration
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Race car – barely
push the pedal
and it has low
acceleration;
stomp down and
it has high
acceleration
Different
masses have
different
accelerations
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
2nd Law
1st Law
Forces are
balanced
when they
cancel each
other out
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Bigger
forces
cause more
acceleration
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Different
masses have
different
accelerations
Race car – barely
push the pedal
and it has low
acceleration;
stomp down and
it has high
acceleration
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
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
2nd Law
3rd Law
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Bigger
forces
cause more
acceleration
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Race car – barely
push the pedal
and it has low
acceleration;
stomp down and
it has high
acceleration
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.
For every action there
is an equal and
opposite reaction
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
2nd Law
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Bigger
forces
cause more
acceleration
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Race car – barely
push the pedal
and it has low
acceleration;
stomp down and
it has high
acceleration
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.
Force has direction,
so opposite means
it goes the other
direction
3rd Law
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
2nd Law
Force has direction,
so opposite means
it goes the other
direction
3rd Law
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Bigger
forces
cause more
acceleration
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Race car – barely
push the pedal
and it has low
acceleration;
stomp down and
it has high
acceleration
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.
The action and reaction
forces are applied to
different objects
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
2nd Law
Force has direction,
so opposite means
it goes the other
direction
3rd Law
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Bigger
forces
cause more
acceleration
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Race car – barely
push the pedal
and it has low
acceleration;
stomp down and
it has high
acceleration
Different
masses have
different
accelerations
The action and reaction
forces are applied to
different objects
Gravity
When a bug hits a
windshield it goes
splat. The windshield
doesn’t have much
acceleration from the
impact with the bug.
A: Earth pulls you down
R: you pull Earth up
Newton’s Laws of Motion
AKA:
momentum
p=m*v
Force has direction,
so opposite means
it goes the other
direction
Inertia: resistance to
change in motion
1st Law
Forces are
balanced
when they
cancel each
other out
3rd Law
2nd Law
Forces
Common
forces are
present all
around us
Forces are
unbalanced
when they do
not cancel
each other
out
Normal force
Friction
Bigger
forces
cause more
acceleration
Gravity
Baseball- bunt it
and it has low
acceleration;
really whack it
and it has high
acceleration
Race car – barely
push the pedal
and it has low
acceleration;
stomp down and
it has high
acceleration
The action and reaction
forces are applied to
different objects
Different
masses have
different
accelerations
Space Ship
When a bug hits a
windshield it goes
splat. The windshield
doesn’t have much
acceleration from the
impact with the bug.
A: ship pushes
gas down
R: gas pushes
ship up
Gravity
A: Earth pulls you down
R: you pull Earth up
Wrap-Up #3
► Dave
and Bob are
pushing against each
other. If the action
force is Dave pushing
Bob to the left, what is
the reaction force?
Wrap-Up #3: Answer
► Dave
and Bob are
pushing against each
other. If the action
force is Dave pushing
Bob to the left, what is
the reaction force?
 Bob pushing Dave to
the right