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Machines Machines are a way to change the force of an action. There are two types of machines, which are simple and complex. Simple machines are devices that change the force used to do work. A complex machine is a device made of two or more simple machines. There are three ways that machines can help reduce effort. One in which would be a machine can change the size of the force. An example of …

…type of simple machine which is the sixth is the screw. The two examples of this would be raising the side of a small building with a jackscrew. Also screwing a table together. Machines are very important to the world today. They make things easier to do and they also make things more efficient. And just because something looks like a complex machine, it could still be a simple machine. ------------------------------------------------------------------------ **Bibliography** Moderen Physical Science