2. Learning Goal/s
1. Describe how simple machines make work
easier and faster.
2. Enumerate the different kinds of simple
3. Manipulate simple machines to describe their
characteristics and uses.
3. Through the centuries, humans have been
challenged to make life easier. Humans have
invented tools to make work less difficult. These
tools are commonly known as machines.
The tools most people think about
when they hear the word
machines are actually a
combination of two or more
4. Machines are devices that make your everyday
tasks easier. They make you do more work with
Look around your house, can you identify the
machines that you use everyday?
5. Lesson Presentation
Simple machines are mechanical
devices that are used to make work easier,
faster and more accurate. They help save
time and effort. They are not expensive and
are easily available when needed. It is good
to keep them around for your convenience.
Work may be defined as force acting
through a distance.
9. Inclined Plane
The Egyptians used simple machines to build the
pyramids. One method was to build a very long
incline out of dirt that rose upward to the top of the
pyramid very gently. The blocks of stone were
placed on large logs (another type of simple machine
- the wheel and axle) and pushed slowly up the long,
gentle inclined plane to the top of the pyramid.
10. Inclined Planes
An inclined plane is
a flat surface that is
higher on one end
make the work of
moving things easier
The spiral ridges or thread serves as inclined plane.
This allows movement from a lower position to a
It used to fasten objects together
back to back
often form a
sharp, thin edge
Wedges are often
used to split
separate or to cut
objects. Some are
used to hold or
It is a bar, a pole or a long rod that can
be used to lift push, or pull things.
Fulcrum- the part that moves at a point
Load- the weight lifted
Effort- applied force (to lift an object)
Pulley are wheels
and axles with a
groove around the
A pulley needs a
rope, chain or belt
around the groove
to make it do work
21. Diagrams of Pulleys
A fixed pulley changes the
direction of a force; It used
to lift or lower the objects
such as a flag.
Movable Pulley: This helps in gaining more force
when lifting an object. It raises
or lowers the load attached to
the other end of the rope which
passes around a groove that is
pulled at the other end.
22. Block-and-tackle PULLEY
The effort needed to
lift the load is less
than half the weight
of the load.
disadvantage is it
travels a very long
23. WHEEL AND AXLE
It is made up of the
wheel that revolves
around the shaft or
rod called the axle
The axle is stuck
rigidly to a large
wheel. Fan blades are
attached to the wheel.
When the axel turns,
the fan blades spin.
24. GEARS-Wheel and Axel
Each gear in a
series reverses the
rotation of the
previous gear. The
smaller gear will
always turn faster
than the larger
25. Rube Goldberg Machines
Rube Goldberg machines are
examples of complex machines.
All complex machines are made
up of combinations of simple
Rube Goldberg machines are
usually a complicated combination
of simple machines.
By studying the components of
Rube Goldberg machines, we
learn more about simple machines
26. Project: Simple Machine Toy
Create a simple machine toy using
available materials at home
Be creative and resourceful
Take photos/videos while doing the
Explain the process and discuss the
simple machines used.
Deadline: March 2, 2022