I HAVE VERY IMP QUESTION IN PHYSICS?

ume you are riding the bicycle at speed of 50kmph , consider the energy applied to reach the speed is X, BUT when you are attempting to stop, you apply the brakes and it stops. Comparing the Large energy the bicycle is moving at, your energy from the finger seems to be of a very small fraction, How is it possible that we are able to stop such a large force by relatively small force from our fingers. PLEASE kindly understand that i am very well am aware that the energy X is converted by friction to heat. But that is not my question. PLease answer me! (Ref: Tor lift One Kg , you need One Kg of force)