Gentle - Lesson Plan

SEMI – DETAILED LESSON PLAN IN PHYSICS IV

I. OBJECTIVE

At the end of the lesson, at least 75% of the students should attain 75% proficiency level in:

a. Defining inertia.

b. Stating the Law of Inertia.

c. Citing situations where the law of inertia applies.

II. SUBJECT MATTER – Physics IV

a. Topic: Introduction of the Law of Inertia

b. Reference: Physics IV SEMP, pp. 289-292

c. Materials:

III. PROCEDURE

A. Initiatory Activities

1. Daily routines

2. Checking of assignment

3. Drill/Review

Let us review the concept of motion.

B. Developmental Activities

1. Motivation

Ask students the following questions:

Suppose the jeepney that you are riding suddenly stops. What will happen to you?

Your body tends to stop and remain in original position.

What if the jeepney stopped and suddenly it moved forward, what happen to you?

Your body will move forward.

2. Presentation of the lesson

The students will form groups having 3-5 members. The teacher will disseminate the

needed materials and activity sheets. The activity is good for 5-10 minutes.

Activity Name: COIN IN A GLASS

Materials: 3x5 index card, glass, coin

Procedure:

1. Place a 3x5 card on top of a glass.

2. Put a coin on the center of the card.

3. Flick the card horizontally with your finger.

4. Repeat the procedure a few times to check your results.

QUESTION:

What happens to the coin? Why?

The result of the activity showed that objects tend to maintain their original

state unless an outside force acts on them. Because you did not push the

coin in Step 3 of the activity, it tried to stay in its original position, dropping

just below it when the index card supporting it was quickly removed.

Name(s):

3. Discussion

Call the representatives from each group to present and explain the results of their

observation.

4. Practice Exercise

Le the students think of it:

Why is that a box pushed along the floor continue to move for sometime even if

it is no longer being pushed?

Because of the floor has less friction.

Which of these vehicles moving at same speed is difficult to stop – a car, a bus

or a train? Explain your answer.

Among the three choices, the train is difficult to stop even though all of them

moving at the same speed, simply because you need too much effort or inertia to

stop the train and too much friction between the wheels of the train and the

railroad.

5. Generalization

Let the students conclude the lesson.

What is inertia?

How is mass related to inertia?

In your own words, state the law of inertia.

Cite some daily activities related to the law of inertia.

Let us go back to the question asked at the beginning of our discussion. The jeepney

tries to continue in its state of motion. However, an outside force, friction, acts on its

wheels slowing down their rotation. Friction between the wheels and road surface

acts continuously, thus the wheels continue to slow down until they stop moving. If

friction were absent, the wheels, once started, would continue moving.

IV. EVALUATION

Fill in the blanks.

1. Inertia is the resistance offered by bodies to any change in its state of ____ or ____.

2. The greater the mass, the___________ the inertia.

3. Suppose you are riding on a jeepney that is moving to the left, when it suddenly stops

your body will move to the___________. Explain your answer.

V. ASSIGNMENT

On your notebook:

1. What is a net force?

2. How is acceleration related to net force?

3. How is acceleration related to mass?

Prepared by:

Carlito A. Doringo

BSE Math

Activity Name: COIN IN A GLASS Activity Name: COIN IN A GLASS Activity Name: COIN IN A GLASS

Materials: 3x5 index card, glass, coin Materials: 3x5 index card, glass, coin Materials: 3x5 index card, glass, coin

Procedure:




4. Repeat the procedure a few times to check

your results.

Procedure:





your results.

Procedure:





your results.

QUESTION:


QUESTION:


QUESTION:


Name(s): Name(s): Name(s):

Gentle - Lesson Plan

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