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• How Does a Bicycle Stay Upright?

• If you get on a bicycle and start pedalling, what do you feel?

• You will feel the movement of the bicycle, as you move forward.

• Doesn't it fill you with surprise that you can move forward on two wheels, just by pedalling

• Let's see what happens when a stationary bicycle is pushed without a rider.

• Oh, look!

• The pushed bicycle keeps moving.

• It's becoming slower and now it has fallen!

• Oh!

• No!

• A moving bicycle will continue to stay upright and move forward because of momentum, till

• it falls down because of gravity.

• Did you know that till a few decades back, scientists thought a bicycle stays upright

• because of the Gyroscopic Effect.

• The Gyroscopic Effect means that a spinning wheel tends to stay aligned in its original

• direction, during momentum.

• This is known as Angular Momentum or spinning action.

• So, if it is not the Gyroscopic Effect, what actually keeps the bicycle upright?

• The scientists who study bicycles, experimented a bit more to discover, that if the gyroscopic

• effect were to be cancelled, the bicycle would continue to be upright!

• So, they assumed, it must be the caster effect of the wheels.

• Because the bicycle wheels are attached to a centre axis on a frame to help them rotate.

• What is the caster effect's role in keeping bicycles upright?

• If you look at a bicycle, you will see that it is designed in such a way, that the front

• wheel's steering axis makes the front wheel move faster than the back wheel.

• So, when the bicycle starts moving to the left, the Centrifugal Force of the back wheel

• would keep it in check, because it is still moving straight.

• The wheel would automatically snap the bike to the right and keep it upright!

• So, now you know, that Angular Momentum and Centrifugal Force keeps a bicycle upright

• when it is moving.

How Does a Bicycle Stay Upright?

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# How does a bicycle stay upright? Curious Questions with Answers | Educational Videos by Mocomi Kids

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ally.chang posted on 2020/03/11
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