Submitted by: Keanne Lyxie A. Lim
Submitted to: T. Nerissa Gonzales

SIMPLE
MACHINES
-
Object that make our work easier or
faster and consists of only one moving
part.

TYPES OF SIMPLE MACHINES
o Levers
o Pulley
o Wheel and Axle
o Inclined Plane
o Gears
o Wedge

LEVERS
-consisting of a bar and fulcrum used to multiply force
or speed to move another object.
Three types of a lever:
•First-class lever
•Second-class lever
•Third-class lever

FIRST-CLASS LEVERS
- Type of lever having the fulcrum between the load and effort
applied.
- Multiplies force and changes direction.

EXAMPLES OF FIRST-CLASS LEVERS

SECOND-CLASS LEVERS
-Type of a lever having the load between the fulcrum and the effort
applied.
- Multiplies force but doesn't change it’s direction.

EXAMPLES OF SECOND-CLASS LEVERS

THIRD-CLASS LEVERS
-Type of a lever in which the effort is placed between the fulcrum and
the load.
- Multiplies speed of force.

EXAMPLES OF THIRD-CLASS LEVERS

Pulleys
- A simple machine consisting essentially of a
wheel with a grooved rim in which a pulled rope
or chain can run to change the direction of the
pull and there by lift a load.
Three types of Pulleys:
•Fixed Pulley
•Movable Pulley
•Pulley System

FIXED PULLEYS
-A device consisting of a wheel rigidly fixed to a
shaft that is used with a belt to transmit energy
and motion to another fixed pulley.
- Changes the direction of the applied force.

EXAMPLES OF FIXED PULLEYS

MOVABLE PULLEYS
- A device consisting of a shell, a moveable
wheel, and a rope that is used to raise a
load.
- Reduce the force applied.

EXAMPLES OF MOVABLE PULLEYS

PULLEY SYSTEMS or
BLOCK and TACKLE
- A pulley system uses ropes and wheels to
redirect the application of force and/or to gain
mechanical advantage.
- Multiply the force applied to reduce a
greater force to lift a load.

EXAMPLES OF PULLEY SYSTEMS

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
- Multiply the force applied to produce a greater
force.

EXAMPLES OF WHEEL AND AXLE

INCLINED PLANE
- 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.
- Reduce the force applied.

EXAMPLES OF INCLINED PLANE

GEARS
- A gear is a rotating machine part having
cut teeth, or cogs, which mesh with another
toothed part in order to transmit torque.
- Change the direction of the force applied.

EXAMPLES OF GEARS

WEDGES
- a simple machine used to separate two objects, or
portions of objects, through the application of force.
- Multiplying the force applied.

EXAMPLES OF WEDGES

PRECAUTIONARY MEASURES IN USING
SIMPLE MACHINES
1.
Use the right
type of simple
machine for the
right job.
2. Secure pulleys
properly before using
them. And make sure
that the it is tightly
tied on the support.
3. Simple machines that
are sharp should be
handled with care also
cover the sharp edges. Do
not leave sharp objects
exposed.