RICHELYN CAPISNON RELONSecondary School Teacher I

Osmeña-Sto. Niño National High SchoolDivision of Dinagat Islands

NEWTON’S THIRD LAW-DO UNTO OTHERS WHAT YOU WANT

OTHERS DO UNTO YOU -

CONFUCIUS

Contextualized Material in Grade 8 Science Unit I Module I

Competency

Objectives Concept/Theme/ Ideas

to Develo

p

Materials to Prepare/Develop

Assessment

Remarks

Infer that when a body exerts a force on another, an equal amount of force is exerted back on it;

a. State the Newton’s Third Law of Motion and identify Action-Reaction Forces;

b. Distinguish Action-Reaction forces from Balanced forces;

Newton’s Third Law of Motion: Law of Interaction(Action-Reaction)

Move Me, Move Me not!Cut-out of available pictures from different materials

GRASP

To be developed

Competency

Objectives

Concept/Theme/ Ideas

to Develo

p

Materials to Prepare/Develop

Assessment

Remarks

Infer that when a body exerts a force on another, an equal amount of force is exerted back on it;

c. Design a Comic Strip to promote the use of seatbelts in minimizing injuries.

Newton’s Third Law of Motion: Law of Interaction(Action-Reaction)

I chase You, You Chase Me BackLetter of Permission, Parent’s Consent, 3 Boats, and Paddles, Activity Notebook,pen

GRASP

To be deve-loped

Have you said “I Love You” to your Mother, to your Father? How about to your friends? Did they also say “I Love You Too”? How does it feel when you hear this statement from someone special? “I Love You and You Love Me Back”. How can you relate this to the Newton’s Third Law of Motion? “In every Action, there is Equal and Opposite Reaction. We have discussed the First and Second Laws of Newton’s Three Laws of Motion. Let us now explore the beauty of the Third Law. At the end of this topic, the students can answer the following questions:

INTRODUCTION

What is Newton’s Third Law of Motion?Can you cite the difference between the concept of

Action-Reaction and Balanced Forces? How? Explain and Relate Action-Reaction Forces from the

given situations.

IGNITE (I MOVE YOU, YOU MOVE ME!) STUDY THE PICTURES BELOW: PUT CHECK IN THE COLUMN FOR MOVE ME, IF THE PICTURE SHOWS ACTION-REACTION, IF YOU THINK THE PICTURE

SHOWS BALANCED FORCES, CHECK THE YOU MOVE COLUMN.

Photos from askthephysicist.com

TEMPLATE FOR STUDENTS’ ACTIVITY (individual activity)

Pictures/Describe the pictures

MOVE ME

MOVE YOU

1

2

3

4

5

OBJECTIVES: State the Newton’s Third Law

of Motion and identify Action-Reaction Forces;

Distinguish Action-Reaction forces from Balanced force

MATERIALS: Letter of Permission, Parent’s Consent, 3 boats without engine, paddle, Activity Notebook, and Pen

ACTIVITY 1I CHASE YOU, YOU CHASE ME

BACK

PROCEDURE:

PREPARATORY ACTIVITYAsk for a permission from the School Principal and a parent consent. Remind the students the Precautionary Measures during the Conduct of Activity.Prior from the Actual Day of the Activity, prepare the boats through asking the permission of the father/owner.(refer to figure 2)Identify an area suitable for the activity. It should be nearer from the seashore.

FIGURE 2: SAMPLE OF BOAT (emotionatpeek.wordexpress.com)

ACTUAL ACTIVITY

The class should go to the Nearest Sea. Divide the class, each group must have

5 members. The group will choose 3 representatives

to ride on the Boat. Each group should select a leader and secretary.

Assigned somebody to stay at the starting line and he/she will be the one to set the participants.

Once the “Go” signal is being said, the representatives should start paddling the boat. Observe.

Continuation for Actual Activity:

Observe the acceleration of the boat when only 1 student is paddling the boat. How about when there are 2, then 3 students? Compare their accelerations.

The teacher will record the performance of the participants.

Assigned student to stay at the finishing line. The participants should CHASE each other to win the Game.

The team who will reach the finishing line first will be the winner.

Afterwards, secure the materials used in the Activity before going back to the classroom.

Ask the following Guide Questions:Q1. What caused the boat to move and reach the finishing line?Q2. What is the Action and the Reaction forces in the activity?Q3. The Action-Reaction Forces are Equal. Based from the Activity, How are you going to testify this?Q4. What is the direction of the boat when you push the water backward? How about when you paddle the water forward?Q5. Is the third Law of Motion is being applied in the Activity? Support .Q7. How can you relate the statement posted in the introduction “I Love You and You Love Me Back” to this activity? Elaborate.

ANALYSIS

Let us go back to the pictures from the Ignite, If you Have Checked the column I Move, Identify the Action-Reaction Forces, If you have Checked the You Move column, Identify the Balanced forces. Complete the table below.

Pictures/Describe the picture

I Move

You Move

Action-Reaction

forces/Balanced forces

KEY CONCEPT: THE NEWTON’S THIRD LAW OF MOTION STATES THAT IN EVERY ACTION, THERE

IS EQUAL AND OPPOSITE REACTION

Action-Reaction Forces Balanced Forces

Two forces are equal in size. Two forces are opposite to

each other in terms of direction.

Two forces have the same line of action.

Action acts on one object, while reaction acts on another object.

Two forces are in equal size. Two forces are opposite to

each other in terms of direction.

Two forces act along the same line.

Two forces act upon the same object

From the Activity, you observed the similarities and differences between the interacting forces in terms of magnitude and direction. This relationship is stated in Newton’s Third Law of Motion – Law of Interaction.

Table 1: Comparing the Action-Reaction and Balanced Forces

BECAUSE THE FORCES ARE EQUAL IN MAGNITUDE AND OPPOSITE IN DIRECTION, DO YOU THINK THEY WILL CANCEL EACH OTHER? IN THIS CASE, NO ADDITION OF FORCES WILL TAKE PLACE BECAUSE THESE FORCES ARE ACTING ON DIFFERENT BODIES.

Example: Juan is sitting the Chair. Identify the Action-Reaction Forces and the Balanced Forces.Action- The force exerted by Juan to the Chair.Reaction-The force exerted by the Chair to Juan.Balanced Forces: The Normal Force exerted by the chair to Juan.The Gravitational Force exerted to JUAN.

Newton’s third Law of Motion is the Law of Interaction also known as Law of Action-Reaction. It states that “In every Action there is Equal and Opposite Reaction. Meaning to say, the magnitude of the force is the same and it is coming from the opposite direction.

GENERALIZATION:

Take note: The Action-Reaction forces act on different objects

GOAL: Minimize Human Injuries during Car CollisionsROLE: You are a Product EndorserAUDIENCE: The High School StudentsSITUATION: The School is celebrating the School Safety Month. As a student, you want to share some tips to your schoolmates on how to become safe in riding specially those houses which are not walking distances from the School Campus. You are going to encourage them to use and wear seatbelts. PRODUCT: Motion Advertisement: Comic StripIn a piece long bond paper, the students should make an advertisement through comic strip about the Significance of using seatbelts as it relates to the Law of Interaction. The characters should show actions to further demonstrate the Newton’s third law. The outputs will be pasted on the mini-information board within the campus.

ASSESSMENT

Category 5(Excellent) 4(Very Satisfactory)

3(Satisfactory)

2(Needs Improvement)

Concept All ideas relate to the Newton’s Third Law

1-2 ideas are not related to the topic

3-4 ideas are not related to the topic

Majority of the ideas are not related to the topic

Illustration The Strip is presented in a creative, organized format.

The Strip is presented in a creative but was less organized format

The Strip is presented in a creative but not organized format

The Strip is not creatively presented and also not organized.

Grammar/ mechanics

There are no more than two errors.

There are no more than three errors.

There are no more than four errors.

There are five or more errors

Audience Feedback

All the audience agreed/encouraged to buy/use seatbelts

There are only 3-4 people who did not agree/encourage to buy/use seatbelts

There are 5-6 people who did not agree/encourage to buy/use seatbelts

There are 7 or more people who did not agree/encourage to buy/use seatbelts.

MOTION STORY MAKING: COMIC STRIP RUBRIC

THANK YOU!GOD BLESS!