Explain the term mechanical advantage. State its unit.
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.
This quantity is a ratio.It is calculated by dividing the output force by the input force.
There is no unit for mechanical advantage as both input and output forces cancel out