SMP NEGERI 1 PADANG

No. Dokumen04Tanggal Terbit2011

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LESSON PLAN

Isi dokumen ini sepenuhnya merupakan milik

SMPN1PDG dan tidak diperbolehkan menggan-

dakan baik sebagian maupun seluruhnya tanpa

seijin tertulis dari manajemen SMPN1PDG

A. Identities

School SMPN 1 Padang

Grade / Semester VIII / I

Subject Physics

Standard Competence 3. Comprehending work, force, and energy role in

daily life.

Basic Competence 1 3.3 Perform experiments about simple machine and

applied in daily life

Indicators 1. Explain the meaning of simple machine.

2. Explain the kind of simple machine

3. Identify the classes of lever

4. Perform experiments for determining the mechanical

advantages

5. Identify the type of pulley

6. Explain the work principle of inclined plane.

7. Determine the value of mechanical advantage on

lever, pulley, and inclined plane.

8. Clarify simple tool in daily life into a group or type

of simple machine

Allocation of time 3 x 40 Minutes (1x meeting)

B. Learning Objectives

After following the learning process, the students are be able to:

1. Explain the meaning of simple machine.

2. Explain the kind of simple machine

3. Identify the classes of lever

4. Perform experiments for determining the mechanical advantages

5. Identify the type of pulley

6. Explain the work principle of inclined plane.

7. Determine the value of mechanical advantage on lever, pulley, and inclined plane.

8. Clarify simple tool in daily life into a group or type of simple machine

C. Learning Materials

SIMPLE MACHINE

1. Define of simple machine is

There are four kind of simple machine

a. Lavers

b. Pulley

c. Wheel

d. Ramp

2. Lavers

Laver can be classes into three classes.

a. In a first class lever the fulcrum is in the middle and the load and effort is on

either side. Example

b. In a second class lever the fulcrum is at the end, with the load in the middle

c. In a second class lever the fulcrum is at the end, with the load in the middle

3. Pulley

A pulley consists of a wheel with a rope or cable placed around the wheel.

A pulley can change the direction of the force or decrease the amount of input

force, depending on if it is a fixed or movable pulley

4. Wheel

The wheel and axle is a simple machine made up of a wheel connected to a post.

The post is called the axle.

5. Inclined Plane

Inclined Plane is a sloping surface that makes it easier to move objects to a higher

or lower place

1. Learning Methodes

1. Model : Modified-free inquiry

2. Methode :

a. Explanation

b. Questioning

c. Discussion

d. Task

e. Experiment

2. Learning Activities

Experiment Class(Modified-free inquiry basis Simple

experiment and easy tool)

Control Class(Learning activities base on BSNP)

1 2

Pre Activities ( 15 minutes)a. Teacher prepares the students

physically and mentally to follow the learning process.

b. Teacher asks guiding question to the student to get the relationship be-tween last knowledge and the next learning material.

c. Teacher motivates the student by asking controversial question or statement that related to the learning material.

d. Teacher explains the learning objec-tives.

e. Teacher tells about scope of mate-rial.

Pre Activities ( 15 minutes)a. Teacher prepares the students

physically and mentally to follow the learning process.

b. Teacher asks guiding question to the student to get the relationship be-tween last knowledge and the next learning material.

c. Teacher motivates the student by asking controversial question or statement that related to the learning material.

d. Teacher explains the learning objec-tives.

e. Teacher tells about scope of mate-rial.

Whilst Activity (90 minutes)1. Exploration

a. Teacher asks the student to observe picture/simulation in front of the class.

b. Teacher asks the student to give an-other example about the material that happen in our daily life and asks the student to think about their ex-ample.

c. Teacher explores student knowledge about physics symptoms by modi-fied-free inquiry; by guiding ques-tion which can make the student find the concept by themselves from their answer.

Whilst Activity (90 minutes)1. Exploration

a. Teacher asks the student to observe picture/simulation in front of the class.

b. Teacher asks the student to give an-other example about the material that happen in our daily life and asks the student to think about their example

c. Teacher explores student knowledge about physics symptoms by dis-cussing.

d. Teacher asks the student to explain about their answer.

d. Teacher asks the student to explain about their answer.

2. Elaborationa. Teacher gives short information

about the material by modified-free inquiry; by demonstrating an activity using simple experiment.

b. Teacher divides the student into some group which each group con-tain 3-4 member.

c. Teacher guides the student to do ex-periments by using modified-free in-quiry basis simple experiment and easy tool to prove the theory; stu-dents free to do the experiment using the tools as long as it related to the objectives.

d. Teacher asks the student to make a report from their result.

3. Comfirmation a. Teacher asks the student to explain

their conclusion from their simple experiment result.

b. Teacher asks other student to give their opinion about their friend pre-sentation.

c. Teacher gives reinforcement about her student answer.

2. Elaborationa. Teacher gives short information

about the material by explanation method.

b. Teacher divides the student into some group which each group con-tain 3-4 member.

c. Teacher guides the student to solve the problem that related to the mate-rial by discussing.

d. Teacher asks the student to make a report from their discussion result.

3. Comfirmation a. Teacher asks the student to explain

their conclusion from their discus-sion.

b. Teacher asks other student to give their opinion about their friend pre-sentation.

c. Teacher gives reinforcement about her student answer.

Closure activity (15 minutes)a. Teacher asks the student to conclude

the lesson.b. Teacher gives a small test to mea-

sure her students knowledge c. Teacher gives the reward to an ac-

tive student in learning activity.d. Teacher gives the homework to in-

crease the student understanding.e. Teacher informs the next material

that will be learned on next meeting.

Closure activity (15 minutes)a. Teacher asks the student to con-

clude the lesson.b. Teacher gives a small test to mea-

sure her students knowledge c. Teacher gives the reward to an ac-

tive student in learning activity.d. Teacher gives the homework to in-

crease the student understanding.e. Teacher informs the next material

that will be learned on next meeting

3. Evaluation

a) Evaluation Technique : written test

b) Evaluation Tool : essay test

c) Instrument used :

1. What is simple machine?

2. Explain three classes of laver!

3. Explain mechanic advantage in inclined plane!

4. Mention three example of wheel!

5. Explain three classified of pulley!

4. Learning Resources

a. Reference

Budi Prasodjo.2009. Physics for Junior High School Year VIII. Jakarta:

Yudhistira. (page: 39-59)

Etsa Indra Irawan. 2008. Pelajaran IPA Fisika Bilingual untuk SMP/MTs, Kelas

VII. Bandung: Yrama Widya. (page 113-144)

http://www.physicsclassroom.com/class/newtlaws/U2L2b.cfm

http://www.edheads.org/activities/simple-machines/

b. Learning media: power point, worksheet,

c. Equipment and material: LCD projector, laptop.

Padang, September 2012

Know Create by:

Physics Teacher Student teacher

Syofiani Evita S.Pd Putri Citra Dewi

NIP : 196010151983032002 NIM.12718.2009