Differentiate between a simple machine and a complex machine.

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Solution

The main points of difference between a simple machine and a complex machine are tabulated below.
Simple machines Complex machines
1. A simple machine is a simple device with few or no moving parts. 1. A complex machine is a combination of two or more simple machines.
2. A lever is a solid bar used to lift heavy loads and is a simple machine. 2. A scissor is a complex machine as it is a combination of two simple machines.
3. A simple machine is simple to use. 3. A complex machine like a sewing machine is relatively tough to use.
4. Pulleys, inclines planes, wedges, etc are some of the examples of simple machines. 4. Sewing machines, bicycles, elevators, etc are some of the examples of complex machines.

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Simple machines	Complex machines
1. A simple machine is a simple device with few or no moving parts.	1. A complex machine is a combination of two or more simple machines.
2. A lever is a solid bar used to lift heavy loads and is a simple machine.	2. A scissor is a complex machine as it is a combination of two simple machines.
3. A simple machine is simple to use.	3. A complex machine like a sewing machine is relatively tough to use.
4. Pulleys, inclines planes, wedges, etc are some of the examples of simple machines.	4. Sewing machines, bicycles, elevators, etc are some of the examples of complex machines.