Why a moving bicycle is balanced while a standing cannot balance of its own?

Question

Why a moving bicycle is balanced while a standing cannot balance of its own?

Answer 1

The spinning wheels of a bicycle has a property called angular momentum. This property depends on the radius, mass, and speed of rotation. In the same way that it's hard to change the direction of a fast moving massive object with a lot of linear momentum, it is hard to change the direction of something with a lot of angular momentum. This means it will resist tipping. (Vectors are needed to explain this, angular momentum is a result of a cross product of radius and speed).

This is the same effect you get with a gyroscope or spinning top that is spinning rapidly.

Answer 2

actualy ur balancing the bicycle by moving the turning thingie...also the wind is flying past it which pushes it to an upright position