What is the formula for efficiency in terms of work done?

Formula for Efficiency

• The formula for efficiency is given by:

\[ \eta = \frac{A_{useful}}{A_{total}} \times 100\% \]

• Where:
• \[ \eta \] represents efficiency.
• \[ A_{useful} \] is the useful work done.
• \[ A_{total} \] is the total work done.

The image shows a related formula: \[ \eta = \frac{mgh}{F_L} \times 100\% \]

• This formula seems to be specific to a scenario involving lifting a mass \(m\) by a height \(h\) using a force \(F_L\).