Machines are the devices to make life easier for people. There are millions of machine to make sure that a man can do his work without putting so much effort and energy in it. From a simple door handle to a computer is all machinery. There are many big and complicated ones such as railway engines and printing presses are made of other small ones which are wheel, axle, ramp, and lever and the screw and pulley. These simple mechanisms have done very complex jobs together.
There was a time in the past when men were used to do every small job with hands and physical energy. They carried tons of loads on their shoulder to transfer from one place to another, Made things with hands without the help of any big tool. They were used to of pulling and pushing heavy object from one place to another. Slowly things start changing and new machines and tools and instruments being made to make the work easier and faster. This change was not rapid, at first small machinery was being made but scientist kept experimenting new technologies and keep manufacturing things which were shocking for people and unimaginative as well.
At first these machines needed physical power to make them run but then they started working with tools installed in them which need energy to done the job. They are powered by chemicals, mechanicals, or are motorized. In the past they needed moving parts to be considered as one but now they have power tools so there is no need for them to move.
They are of many types and each type has hundreds of different kinds. Mechanical, electronic and Molecular are all their types.
The word Mechanicals have been derived from machinery. It is related to tools and mechanical applications of science. They are divided into two kinds’ simple machine and engine. They are the basic moveable tools which include lever, pulley, and screw then there are wheels, axle and whale. Engine on the other hand is designed to convert the energy into mechanical motion. They are also known as motors. There are heat engines to create heat and electric motors to create motion.
Electrical are related to electricity and designed to producing, providing, transmitting, and operating by electricity. There are computers, electric and electronic machines.
The devices which are made to convert the mechanical energy into electrical energy are electrical. They can change the voltage from one level to another level.
Electronics are the mixture of different fields of science such as engineering, physics and technologies. There are millions of examples of electronic in the world.
Computers need electric charges for current and magnetization to store and manipulate information.