LESSON PLAN

Education Unit : JHS IPA Terpadu

Class : VIII / 2

Subject : Science

Topic/ sub topic : Simple Machine / Inclined Plane

Time Allocation : 1 x 25 Minutes

A. MAIN COMPETENCY

1. Respect and appreciate the teachings of their religion.

2. Respect and appreciate the honest behavior, discipline, responsibility, care

(tolerance, mutual assistance), mannered, confident in interacting effectively with

the social and natural environment within reach of the association and their

presence.

3. Understand and apply knowledge (factual, conceptual and procedural) based on

curiosity about science, technology, arts, culture related to the phenomena and

events that visible.

4. Try, process, present, and reason in the realm of the concrete (use, describe,

assemble, modify, and create) and the realm of the abstract (write, read, count,

draw, and compose) according to what has been learned at school and other

sources that have the same viewpoint/ theories.

B. BASIC COMPETENCY

3.5 Understanding why people create and use simple machines to make tasks easier

to perform (mechanical advantage).

4.5 Doing experiment how inclined planes function and how they are used to move

heavy objects.

C. INDICATORS OF LEARNING

3.5.1 Identifying the simple machine types

3.5.2 Explaining why people create and use simple machine especially inclined

plane to make tasks easier to perform (mechanical advantage).

4.5.1 Explaining how inclined planes function

4.5.2 Explaining how they are used to move heavy objects

D. LEARNING OBJECTIVES

1. Students can identify the simple machine types after watching a video

2. Students can explain why people create and use simple machine especially

inclined plane to make tasks easier to perform (mechanical advantage) after

watching a video

3. Students can explain how inclined planes function after doing an experiment.

4. Students can explain how they are used to move heavy objects after doing an

experiment

E. MATERIALS

When we do work, we must expend energy. To conserve our energy and make

our work easier, humans have invented a wide variety of machines. Machines are

simply devices that help us to apply forces and do work. Some machines, such as

power saws, tractors, or cars are complicated and have many moving parts. For

thousands of years, we have also used many simple machines to help us do our work.

Simple machines are devices that change the force we can exert on an object. They

allow us to lift heavier objects or pull things with more force than we could without

the simple machine. Simple machines often have only one or even no moving parts.

The six simple machines that your students will explore in this project are:

Levers

Inclined planes

Wedges

Screws

Wheels and axles

Pulleys

Inclined Plane

The inclined plane is a very simple machine with no moving parts. It is a sloping

surface with one raised end. The more gentle the slope of an inclined plane, the easier

it will be to slide or roll the object. A ramp is a common type of inclined plane.

Furniture movers use ramps because it is easier to slide or roll a heavy box up a ramp

than to lift it up into a truck.A wedge is like an inclined plane, but instead of helping

move objects to a higher point, a wedge helps to cut objects apart or hold them

together. Knives and axes are common wedges used to cut objects apart, while a door

stop is a wedge used to hold objects together. Thesharper the edge of a wedge, the

easier it is to drive in or under an object. Screw is use the principle of inclined plane, a

screw is a rod with a helical thread (groove) around its outside surface. There is often

another matching piece with a hole threaded on the inside. The rod moves through

this hole as it is turned. A nut and bolt is an example. Screws have many purposes

including fastening objects together (wood or metal screws), making holes in the

objects (drill bits), or squeezing things together (a vise). A wood screw is a

combination of a screw (the threaded body) and a wedge (the sharp point).

F. LEARNING APPROACH/LEARNING MODEL/LEARNING METHODS

1. Learning Approach : Contextual

2. Learning Model : Discovery

3. Learning Methods : Experiment and observation

G. LEARNING PROCESS

No Activity Discovery’s steps Activities Description Duration

1. Introduction • Teacher greets the

students and ask one

student to lead the pray;

• Teacher check

attendance of student.

• Teacher Reminds the

students to previous

lesson about lever;

• Teacher starts the lesson

with questions that relate

the topic to real life :

5 Minutes

Have you ever climbed

the high rise building?

How to go to roof top of

the building? Why

staircase can easier our

work?

• Teacher tells the learning

purpose and advantages

to the students;

• Teacher devides students

into three groups, each

group consist of 4-5

students;

2. Core activity

1. Stimulation

2. Problem

statemen

3. Data collection

4. Verification

and

5. Generalization

Observing

Students see a simple

machine video’s

Asking

After watching simple

machine video’s, student

ask to teacher why simple

machine easier our work.

Then, teacher explain

mecanical advantages

matter’s

Experiment

Students Identification

the example of inclined

plane.

Students do inclined

plane experiment with

some items that have

been provided.

Assosiating

Student discuss the

worksheets that given by

teacher.

Communicating

Students present the

result of discussion

Confirmation of the

student presentation by

the teacher.

17

Minutes

3. Post Activity Teacher with Students

conclude the material that

has been studied

3 Minutes

Teacher gives assigment

to student.

Teacher end the

learning process with

prayers and greetings.

H. MEDIA, TOOLS AND LEARNING RESOURCES.

A. MEDIA

-Video

- Worksheet

B. TOOLS

- items that found in daily life (wood, book, string, nail, etc)

C. LEARNING RESOURCES

Tim Abdi Guru. 2016. IPA TERPADU untuk SMP/MTS Kelas VIII. Jakarta:

Erlangga

Semarang, June 2017

Headmaster of JHS IPA Terpadu Science Teacher

.(_____________________) Risyanti

NIP/NIK: NIM. 4001414040