A regenerative braking system in an electric vehicle recovers kinetic energy during deceleration and stores it in a supercapacitor. The energy transfers involved during one braking cycle are shown in the diagram below.
Calculate the efficiency of the regenerative braking system during this cycle.
Use the equation:
efficiency=useful energy stored by the systemtotal kinetic energy captured \text{efficiency} = \frac{\text{useful energy stored by the system}}{\text{total kinetic energy captured}} efficiency=total kinetic energy captureduseful energy stored by the system