you might have noticed that while riding a bicycle it stops quickly when you apply the front brakes but when..

Question

you might have noticed that while riding a bicycle when you apply the front brakes the cycle comes to rest almost instantaneously but when u apply the rear brakes the cycle does not come to rest quickly but skids for a short distance. WHY?

Answer 1

This phenomena is referred to as braking dynamics. since the bike only touches the ground below its center of gravity, braking will cause torque on the bike, trying to rotate it forward (nose over). This torque pushes down on the front tire and lifts the rear, so that the front carries more weight. (this is why you can do a stoppie with strong brakes)

Since the maximum friction your tires can produce is proportional to the weight on them, after this shift in weight, the front tires can produce much more braking force than the rear, as more and more weight loads on them.

This is why in old driving schools people were taught to not slam on the brakes--cars have stronger brakes on the front, and slamming on them does not give the car time to shift its weight to the front. Nowadays, of course, ABS does this for us.

You will notice that many street cars have disc brakes on the front and only drum brakes (or smaller disc brakes) on the rear. This is the reason for that.

Incidentally, on a bike, it is a very bad idea to apply the rear brake by itself, because you need your rear wheel to roll for directional stability. If it starts skidding, any little turn could make your bike try to swap ends.

Answer 2

At speed,in case you in the present day brake at the same time with your front brake,this is going to un-weight the rear of the Bicycle and subsequently sending you promptly in front and over your handlebar for a fall,similar to how a motor vehicle would not have ABS...yet greater painful.front Brakes could purely be used once you're additionally braking at the same time with your rear,front brake has similarities to an emergency brake to extend your braking overall performance once you're close to hitting some thing,conserving the rear brake at the same time as braking with the front will defend a weight stability and subsequently would not deliver you off your Bicycle. So in end: You brake at the same time with your returned Brakes.yet in circumstances of almost hitting a fellow motorbike proprietor,motor vehicle or different merchandise,you ruin with the two breaks.

Answer 3

The second answer answered your question. But safe stopping on a bicycle requires the proper balance between the front and rear brakes. Hit the front brake too hard and the front wheel stops but you keep going, head over handlebars. Or the front wheel skids, which gives you more of a control problem than a rear wheel skid.

Answer 4

It depends on how exactly you are braking and what kind you use, but ingeneral, the bike braking from the rear pulls the bike to a stop, but when you brake from the front, the bike actually leans forward a little rotating around that front wheel. The rotation accounts for the loss of energy.