Quote Originally Posted by badkuk
i really don't get it...

i read somewhere that hard braking can affect fuel economy; ngayun ngayon lang i also read that "malfunctioning" brakes can also affect fuel economy since, quote "the vehicle must work harder to overcome the resistance."

pwede po paki explain?

basically braking is converting kenetic energy to heat. Since it takes fuel to get your car moving, anything that slows it down (malfunctioning brakes, open windows, flat tire, etc) will waste energy.

Hard braking can waste energy because you might slow down too much and then you will need to accelerate again to your desired speed. Also an alternative to hard braking is to coast to your target speed which will not consume any more fuel than normal driving would.