This document defines simple and compound machines and describes the six simple machines: inclined plane, screw, wedge, lever, pulley, and wheel and axle. It provides examples of each machine, explaining how they work and their functions. Compound machines are defined as combinations of two or more simple machines and examples are given like tanks, engines, lathe machines, and cycles.
A simple machine is a mechanical device that changes the direction or magnitude of a force.[1] In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force.Usually the term refers to the six classical simple machines that were defined by Renaissance scientists
A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load. The ratio of the output to the applied force is called the mechanical advantage.
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2. .::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
4. “The 6 Simple Machines”
Inclined Plane Screw Wedge
Pulley Wheel and Axle
Lever
5. Inclined Planes
• An inclined plane is a
flat surface that is
higher on one end
• Inclined planes make
the work of moving
things easier
6. 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
7. 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.
8. 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.
9. Levers
A lever is a machine
consisting of a beam or
rigid rod pivoted at a fixed
hinge, or fulcrum.
10. .::Types Of Levers::. • In a first class lever the
fulcrum is in the
middle and the load
1) Levers-First Class and effort is on either
side
• Think of a see-saw
PLIER
11. • In a second class lever
2)Levers-Second Class the fulcrum is at the
end, with the load in
the middle.
12. 3)Levers-Third Class • In a third class lever the
fulcrum is again at the
end, but the effort is in
the middle.
13. 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.
14. WHEEL AND AXEL
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.
15. Some other applications of
Wheels & Axles
RAILWAY WHEELS Turning a doorknob rotates the spindle
which moves the latch.
16. COMPOUND MACHINES
1. 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