118

Newton’s Third Law Notes 117

12/4/2014

Starter:12/4/2014

Practice/Application:Practice/Application:Glue here when doneGlue here when done

Exit: Write 10 things that you do during the day that have an action-reaction force. List the action and reaction.1.1.22334455667788991010

Newton’s Third Law Notes

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?

What do you know about Newton’s third law?

December 4, 2014December 4, 2014AGENDAAGENDA

8.6 C8.6 CStudents will

investigate and describe applications of Newton’s third law of action-reaction by reading and writing during notes and an

activity.

1 Starter1 Starter

2. Notes2. Notes

3. Activity3. Activity

Date Lecture/ Activity/ Lab Page

Table of Contents

11/3 Speed, Velocity, and Acceleration Notes 87-8811/4 Speed and Velocity Lab 89-9011/5 Interpreting Graphs 91-9211/6 Walking Lab II with graphing 93-9411/10 Balanced and Unbalanced Forces 95-9611/12 Newtons 1st Law 97-9811/13 Newton’s First Law Lab 99-10011/14 Newton’s First Law Writing 101-10211/17 CBA review 103-10411/19 Newton’s First Law Lab #2 105-10611/20 Newton’s Second Law 107-10811/21 Newton’s Second Law Writing 109-11012/1 Newton’s Second Law Lab 111-11212/2 Newtons Second Law Ws 113-11412/3 Newton’s Second Law Lab # 2 115-11612/4 Newton’s Third Law Notes 117-118

Newton’s Third Newton’s Third Law NotesLaw Notes

For every action there is For every action there is an opposite, but equal an opposite, but equal

reaction…reaction…

TEKS 8.6C investigate and describe applications of Newton’s law of inertia, law of force and acceleration, and law of action-reaction such as in vehicle restraints, sports activities, amusement park rides, Earth’s tectonic activities, and rocket launches

Newton’s third Newton’s third law states that law states that for every for every actionaction there is there is always an always an oppositeopposite, but , but equal equal reactionreaction. .

This means that This means that when you push when you push on an object, it on an object, it pushespushes backback on on you with you with equal equal forceforce..

Observe the Observe the person person pushing the pushing the ball in the ball in the picture. picture.

The person is The person is pushing on the pushing on the ball, but the ball ball, but the ball is is pushing backpushing back on the person. on the person.

The reaction is The reaction is NOT the ball NOT the ball

moving forwardmoving forward (The ball moving (The ball moving forward is forward is cause cause

and effectand effect) )

Action: person Action: person pushing ballpushing ballReaction: ball Reaction: ball pushes backpushes back on person on person

See if you can See if you can identify the identify the

opposite reaction opposite reaction in each of the in each of the pictures! Draw pictures! Draw

arrows to show the arrows to show the direction of the direction of the

action and action and opposite reaction. opposite reaction.

Fist hits wall.

a. wall hits fist

b. ball bumps head

Head bumps ball.

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 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.

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?

Newton’s Third Law Notes 118

118

Newton’s Third Law Notes 117

12/4/2014

Starter:12/4/2014

Practice/Application:Practice/Application:Glue here when doneGlue here when done

Exit: Write 10 things that you do during the day that have an action-reaction force. List the action and reaction.1.1.22334455667788991010

Newton’s Third Law Notes

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?

What do you know about Newton’s third law?