An electric winch is used to lift a heavy load. The energy transfers involved in this process are shown in the diagram below.
Calculate the efficiency of the winch.
Use the equation:
efficiency=useful energy transferred by the winchtotal energy supplied to the winch \text{efficiency} = \frac{\text{useful energy transferred by the winch}}{\text{total energy supplied to the winch}} efficiency=total energy supplied to the winchuseful energy transferred by the winch