What is machine. what is mechanica advantage

The machine is the device which reduces the human efforts is known as the Machine. A machine is a device that makes human work easier by changing the size or direction of the workforce. some examples of Machines are Cars, planes, Ship and Microwave oven etc.

Mechanical advantages

If you compare the output force with the input force, you can find the advantage of using the Machines.

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device preserves the input power and simply trades off forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever.