In school I learned that braking is a waste of fuel as the kinetic energy transfers to sound and heat (which is effectively a loss, right?). So how does regenerative braking recoup some of that energy into the car’s battery?
In: Engineering
Regenerative brakes don’t currently stop a car, when the brake is applied a small motor is engaged which converts the kinetic energy into electricity which can be used to charge the car battery. This slows the car down but is not yet able to stop a car so they are used in combination with your normal brake disks. It is not just a marketing gimmick. As the technology improves they could replace traditional brakes.
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