Work and Machine

Machines can include large appliances, power tools, factory machines, or construction equipment. While all of those are machines, other simple tools such as hammer, screw, wheel, axle and more are also considered as a machine. They are defined as a simple machine.

A machine is known to make our work easier. By applying the force to the machine, the machine will apply force to an object. Applying force to the machine is called “Input Force”, and when a machine applies force to an object it is called “Output Force

Work = Force × Distance

Machines make work easier by increasing the amount of force that is applied, increasing the distance or changing the direction in which the force is applied. They do not increase the amount of work that is done, they just change how the work is done.

Simple machine

There are 6 simple machines:
  1. Lever
  2. Wedge
  3. Pulley
  4. Wheel and axle
  5. Inclined Plane 
  6. Screw

Compound machine

Image (School toolbox)

Compound machines are consist of one or two types of simple machines. The picture below shows an example of compound machines: 


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