Simple Machines and Complex Machines

Simple Machines & Complex Machine

10.2

Simple Machines & Complex Machine

The simple machine is a tool that helps us do work more easily and quickly.

Type of simple machine	Description
Wheel and axle.	Wheels and axles are devices that consist of wheels fixed on a rod called an axle Example, door knob
Lever	Lever is a tool consisting of a rod fixed on a fulcrum to lift or pry up an object load Example, broom
Screw	A screw is a grooved cylindrical tool that can be inserted into an object by rotating it to unite or tighten two parts of an object Example, bottle and its cap
Gear	Gear is a tool that consists of jagged wheels Example, gears in the clock
Pulley	A pulley is a device consists of a grooved wheel that allows a rope to pass through it to lift or lower a load Example, window blinds
Inclined plane	Inclined plane is a tilted flat surface which has one of its ends are placed at different height Example, the stairs
Wedge	Wedge is a tool which has one pointed end and is used to cut, hold and stop an object Example, knife & doorstep

Complex machines

Some of the tools used in our daily lives consist of a combination of several types of simple machines
A tool that consists of a combination of more than one simple machine is a complex machine

A sustainable complex machine is a machine that has sustainable features, such as:

durability
not easily damaged
profitable to the users
does not adversely affect the environment
easy and safe to use

An example of a sustainable machine is a bicycle, because a bicycle is easy to use and does not require fosil fuel to move it. Therefore, the bicycle will not pollute the environment.