SIMPLE &

COMPOUND MACHINES

.::DEFINITIONS::.

MACHINE : A machine is a tool consisting of one or more parts that is constructed to achieve a particular goal.

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

COMPOUND MACHINE : Combination of two or more simple machine is called Compound Machine

Simple Machines

“The 6 Simple Machines”

Lever

Pulley Wheel and Axle

WedgeScrewInclined Plane

Inclined Planes• An inclined plane is a

flat surface that is higher on one end

• Inclined planes make the work of moving things easier

Screws

A screw is a mechanism that converts rotational motion to linear motion, and a

torque (rotational force) to a linear force. It is one of the six classical simple machines.

The most common form consists of a cylindrical shaft with helical grooves or

ridges called threads around the outside

Screw

The mechanical advantage of an screw can be calculated by dividing the circumference by the pitch of the screw.

Pitch equals 1/ number of turns per inch.

Wedges• A wedge is a triangular shaped

round tool, a compound and portable inclined plane, and one of the six classical simple machines. It can be used to separate two objects or portions of an object, lift an object, or hold an object in place.

Levers

A lever is a machine consisting of a beam or

rigid rod pivoted at a fixed hinge, or fulcrum.

.::Types Of Levers::.

1) Levers-First Class

• In a first class lever the fulcrum is in the middle and the load and effort is on either side

• Think of a see-saw

PLIER

2)Levers-Second Class • In a second class lever the fulcrum is at the end, with the load in the middle.

3)Levers-Third Class • In a third class lever the fulcrum is again at the end, but the effort is in the middle.

Pulleys• A pulley is a wheel on an axle that is designed to support movement of a cable or belt along its circumference. • Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power.

WHEEL AND AXELThe 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.

Some other applications of Wheels & Axles

Turning a doorknob rotates the spindle which moves the latch.

RAILWAY WHEELS

COMPOUND MACHINES1. Combination of two or more simple machine

is called Compound Machine.2. Simple Machines can be put together in

different ways to make complex machinery.

TANKS

Mercedes V6 Internal Combustion Engine

LATHE MACHINE

CYCLE

A Presentation by :

Khan KhalidKhan MushranMohd. AshrafManiyar Altamash Prajapati Harinath

THANK YOU