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Why is the driving wheel bicycle rear wheel, front and rear wheel What's different?

Desert dust blowing Star2010-02-23 10:10:15 +0000 #1
Jiqiu! To learn more about the Oh!谢啦!
1Schumacher12010-02-23 10:20:42 +0000 #2
As the bicycle rear wheel is the transfer of people doing work to make it active, the rear is the driving force, so the friction is the rear wheel forward; while front wheels are subject to power forward while rotating, that is, forced movement, so the front wheel friction is backward!

As the rear wheel is the main drive, and people walk, if there is no friction, the wheel will be backward movement. The wheel is actually a backward force to the ground, due to the role of forces between objects is mutual, the ground will give the wheel a reaction force, this force is the friction, the direction forward. Front is subject to rear-wheel drive, has always been forward movement. Therefore, it is subject to friction hindering the forward movement direction is backward in.
ddiididi2010-02-23 10:35:27 +0000 #3
because the front wheel to control the direction of

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