1. REPORTER: Carmela Mendoza
Simple Machine

2. Throughout history, humans have developed a
number of devices to make work easier. The most
notable of these are known as the "six simple
machines": the wheel and axle, the lever, the
inclined plane, the pulley, the screw and the wedge

3. SIMPLE MACHINE
A simple machine is a mechanical device that changes
the direction or magnitude of a force

4. Types of Simple Machine
PulleyScrew
Inclined Plane
Wedge Lever Wheel and axle

5. Screw
 mechanism that converts rotational motion
to linear motion, and a torque (rotational force)
to a linear force

6. Pulley
 A pulley is a wheel on an axle or shaft that is
designed to support movement and change of
direction of a cable or belt along its
circumference.

7. Inclined Plane
 also known as a ramp, is a flat supporting
surface tilted at an angle, with one end higher
than the other, used as an aid for raising or
lowering a load

8. Wedge
 triangular shaped tool, and is a
portable inclined plane
 can be used to separate two objects or
portions of an object

9. Lever
 machine consisting of a beam or rigid rod
pivoted at a fixed hinge, or fulcrum

10. Class of Lever

11. Class 1:
 Fulcrum in the middle: the effort is applied on
one side of the fulcrum and the resistance on
the other side, for example, a seesaw,
a crowbar or a pair of scissors. Mechanical
advantage may be greater or less than 1.

12. Class 2:
 Resistance in the middle: the effort is applied
on one side of the resistance and the fulcrum
is located on the other side, for example,
a wheelbarrow, a nutcracker, a bottle
opener or the brake pedal of a car. Mechanical
advantage is always greater than 1.

13. Class 3:
 Effort in the middle: the resistance is on one
side of the effort and the fulcrum is located on
the other side, for example, a pair
of tweezers or the human mandible.
Mechanical advantage is always less than 1.

14. Wheel and Axle
 The wheel and axle is generally considered to
be a wheel attached to an axle so that these
two parts rotate together in which a force is
transferred from one to the other. In this
configuration a hinge, or bearing, supports the
rotation of the axle.

15. Importance of Simple Machine
 Screws - used to hold different parts of machines
together.
 Pulley - make it easier to pull a rope, to change the
direction of a force, or to get more mechanical
advantage and lift something heavier than you can lift
by yourself.
 Inclined plane - a load can be pulled up the plane by a
sideways input force and heavy objects may be lifted.
 Wedge - can take something apart that is really big
and it is easier to move
 Lever -helps you move something heavy, or make
something go fast.
 Wheel and Axle – used to lift weights.

16. General Importance of Simple
Machine
 transferring a force from one place to another,
 changing the direction of a force,
 increasing the magnitude of a force, or
 increasing the distance or speed of a force.

17. THANK YOU !