Download Newtons 3rd Law Notes

117
Newton’s Third Law Notes
12/4/2014
Starter:
What do you know about Newton’s
third law?
Practice/Application:
Glue here when done
Exit: Write 10 things that you do during
the day that have an action-reaction
force. List the action and reaction.
1.
2
3
4
5
6
7
8
9
10
Newton’s Third Law Notes
118
12/4/2014
Connection/Exit : do activity then
answer after do Ws ( leave space to
answer) Discussion:
•1. What do you notice?
•2. Will the palm of your hand indent
without something pushing on it?
•3. What was pushing on your hand to
leave the indentation?
•4. What direction was it pushing?
•5. Was this a force?
•6. What forces were acting in this
situation?
•7. Did your hand or the table
accelerate?
•8. If forces were acting on your
hand and the table, why was no
motion observed?
• 9. Can we say that, if we push on an
object, the object pushes back with
an equal force?
December 4, 2014
AGENDA
8.6 C
Students will
investigate and
describe applications
of Newton’s third law
of action-reaction by
reading and writing
during notes and an
activity.
1 Starter
2. Notes
3. Activity
Table of Contents
Date
11/3
11/4
11/5
11/6
11/10
11/12
11/13
11/14
11/17
11/19
11/20
11/21
12/1
12/2
12/3
12/4
Lecture/ Activity/ Lab
Speed, Velocity, and Acceleration Notes
Speed and Velocity Lab
Interpreting Graphs
Walking Lab II with graphing
Balanced and Unbalanced Forces
Newtons 1st Law
Newton’s First Law Lab
Newton’s First Law Writing
CBA review
Newton’s First Law Lab #2
Newton’s Second Law
Newton’s Second Law Writing
Newton’s Second Law Lab
Newtons Second Law Ws
Newton’s Second Law Lab # 2
Newton’s Third Law Notes
Page
87-88
89-90
91-92
93-94
95-96
97-98
99-100
101-102
103-104
105-106
107-108
109-110
111-112
113-114
115-116
117-118
Newton’s Third
Law Notes
For every action there is an
opposite, but equal reaction…
TEKS 8.6C investigate and
describe applications of Newton’s
law of inertia, law of force and
acceleration, and law of actionreaction such as in vehicle
restraints, sports activities,
amusement park rides, Earth’s
tectonic activities, and rocket
launches
Newton’s third
law states that
for every action
there is always
an opposite, but
equal reaction.
This means that
when you push on an
object, it pushes
back on you with
equal force.
Observe the
person pushing
the ball in the
picture.
The person is
pushing on the ball,
but the ball is
pushing back on the
person.
The reaction is
NOT the ball
moving forward
(The ball moving
forward is cause
and effect)
Action: person
pushing ball
Reaction: ball
pushes back on
person
See if you can
identify the opposite
reaction in each of
the pictures! Draw
arrows to show the
direction of the action
and opposite reaction.
Fist hits wall.
a. wall hits fist
Head bumps ball.
b. ball bumps head
Hand touches globe.
c. globe touches hand
Boy kicks ball.
d. ball kicks boy
Athlete pushes bar up.
e. bar pushes down on athlete
Ball hits bat.
f. bat hits ball
Windshield hits bug
bug.
g. bug hits windshield
Finger touches nose.
h. nose touches finger
Connection


Rest the palm of your hand lightly against
the edge of a desk and then observe your
palm.
Answer the questions when you are
done.
Newton’s Third Law Notes
118
Connection/Exit : do activity then answer
• Discussion:
•1. What do you notice?
•2. Will the palm of your hand indent without something
pushing on it?
•3. What was pushing on your hand to leave the indentation?
•4. What direction was it pushing?
•5. Was this a force?
•6. What forces were acting in this situation?
•7. Did your hand or the table accelerate?
•8. If forces were acting on your hand and the table, why
was no motion observed?
• 9. Can we say that, if we push on an object, the object
pushes back with an equal force?
117
Newton’s Third Law Notes
12/4/2014
Starter:
What do you know about Newton’s
third law?
Practice/Application:
Glue here when done
Exit: Write 10 things that you do during
the day that have an action-reaction
force. List the action and reaction.
1.
2
3
4
5
6
7
8
9
10
Newton’s Third Law Notes
118
12/4/2014
Connection/Exit : do activity then
answer after do Ws ( leave space to
answer) Discussion:
•1. What do you notice?
•2. Will the palm of your hand indent
without something pushing on it?
•3. What was pushing on your hand to
leave the indentation?
•4. What direction was it pushing?
•5. Was this a force?
•6. What forces were acting in this
situation?
•7. Did your hand or the table
accelerate?
•8. If forces were acting on your
hand and the table, why was no
motion observed?
• 9. Can we say that, if we push on an
object, the object pushes back with
an equal force?