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A. Identities

School SMPN 1 Padang

Grade / Semester VIII / ISubject Physics

Standard Competence 3. Comprehending work, force, and energy role indaily life.

Basic Competence 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 machine3. Identify the classes of lever4. Perform experiments for determining the mechanical

advantages

5. Identify the type of pulley6. 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

SMP NEGERI 1 PADANGNo. Dokumen : FM-12/KUR-04

Tanggal Terbit : 06 Januari 2011Revisi : 0.0

Halaman : 01 dari 01

LESSON PLAN

Isi dokumen ini sepenuhnya merupakan milik SMPN1PDG dan tidak

diperbolehkan menggandakan baik sebagian maupun seluruhnya tanpa

seijin tertulis dari manajemen SMPN1PDG


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3. Identify the classes of lever4. Perform experiments for determining the mechanical advantages5. Identify the type of pulley6. 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 isThere are four kind of simple machine

a. Laversb. Pulleyc. Wheeld. Ramp

2. LaversLaver can be classes into three classes.

a. In a first class lever the fulcrum is in the middle and the load and effort is oneither side. Example

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

3. PulleyA 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. WheelThe wheel and axle is a simple machine made up of a wheel connected to a post.

The post is called the axle.

5. Inclined PlaneInclined 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


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2. Methode :a. Explanation

b. Questioningc. Discussiond. Taske. 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

between last knowledge and the next

learning material.

c. Teacher motivates the student byasking controversial question orstatement that related to the learning

material.

d. Teacher explains the learningobjectives.

e. Teacher tells about scope ofmaterial.

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

physically and mentally to follow the

learning process.

b. Teacher asks guiding question to thestudent to get the relationship

between last knowledge and the next

learning material.

c. Teacher motivates the student byasking controversial question orstatement that related to the learning

material.

d. Teacher explains the learningobjectives.

e. Teacher tells about scope ofmaterial.

Whilst Activity (90 minutes)1. Exploration

a. Teacher asks the student to observepicture/simulation in front of the

class.b. Teacher asks the student to give

another example about the material

that happen in our daily life and asks

the student to think about their

example.

c. Teacher explores student knowledgeabout physics symptoms by

modified-free inquiry; by guiding

question 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 observepicture/simulation in front of the

class.b. Teacher asks the student to give

another example about the material

that happen in our daily life and asks

the student to think about their

example

c. Teacher explores student knowledgeabout physics symptoms by

discussing.

d. Teacher asks the student to explainabout their answer.


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d. Teacher asks the student to explainabout their answer.

2. Elaborationa. Teacher gives short information

about the material by modified-freeinquiry; by demonstrating an activity

using simple experiment.

b. Teacher divides the student intosome group which each group

contain 3-4 member.

c. Teacher guides the student to doexperiments by using modified-free

inquiry basis simple experiment and

easy tool to prove the theory;

students free to do the experiment

using the tools as long as it related tothe objectives.

d. Teacher asks the student to make areport from their result.

3. Comfirmationa. Teacher asks the student to explain

their conclusion from their simple

experiment result.

b. Teacher asks other student to givetheir opinion about their friend

presentation.

c. Teacher gives reinforcement abouther student answer.

2. Elaborationa. Teacher gives short information

about the material by explanationmethod.

b. Teacher divides the student intosome group which each group

contain 3-4 member.

c. Teacher guides the student to solvethe problem that related to the

material by discussing.

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

3. Comfirmationa. Teacher asks the student to explain

their conclusion from their

discussion.

b. Teacher asks other student to give theiropinion about their friend presentation.

c. Teacher gives reinforcement abouther student answer.

Closure activity (15 minutes)

a. Teacher asks the student to concludethe lesson.

b. Teacher gives a small test tomeasure her students knowledge

c. Teacher gives the reward to anactive student in learning activity.

d.

Teacher gives the homework toincrease the student understanding.

e. Teacher informs the next materialthat will be learned on next meeting.

Closure activity (15 minutes)

a. Teacher asks the student toconclude the lesson.

b. Teacher gives a small test tomeasure her students knowledge

c. Teacher gives the reward to anactive student in learning activity.

d.

Teacher gives the homework toincrease the student understanding.

e. Teacher informs the next materialthat will be learned on next meeting

3. Evaluation

a) Evaluation Technique : written testb) Evaluation Tool : essay testc) Instrument used :1. What is simple machine?


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

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