Balance Bicycle

why it is easy to balance a bicycle on?

It is not impossible, just very hard. It is very unstable requires an excellent control (which I did not but I saw him do). Although it moves Act wheels like gyroscopes big plus when pressed on a bicycle wheels tend to push the bike to recover. Makeing a bicycle in motion a stable mechanism.

We can balance a bicycle when he is not moving forward, but only because they turn the front wheel slightly right or left, called trackstand to help maintain balance. I have not seen anyone balance up with the right front wheel as it usually is when moving. Flag

Because both tired! HA ha!

No, seriously, the exercise spinning gyroscopic effect, thus maintaining a vertical position, like a gyroscope does not rotate when.
The bike wheels are essentially two gyroscopes rotation.

It is not impossible to reconcile a bike while standing still.
Many runners qualified to do so on an obstacle course.
When he moves into the spinning gyroscopes.
They create a rigidity in space or gyroscopic inertia, and tends to resist changes in its orientation, which is standing.
This makes the bike easier to balance. For most people.
Some are simply more sensitive to gravity.

As has been said, it is not impossible, just difficult.
This is not the gyroscopic stability, (as has been said)
helps you to balance a moving bicycle, however.
The dynamics of the vehicle.
At very low speeds (where all the gyroscopic effect of the wheel would be negligible), you maintain balance in the direction of the fall and the rights of the centrifugal force of the vehicle.
It is instinctive and you do not even realize that you do once you learn it.
It is at higher speeds than the "gyroscopic" effect is felt.

As already indicated, it is possible to balance on a stationary bike - I'm not a gymnast, but I can do.

The gyroscopic effect is negligible, the mass of the wheels is much too low relative to the chassis and rider. The most important is the design of management, if you extend the axis of the direction of the road, you will find that this point is ahead of the contact point of the front tire, so the front wheel casters, and turns naturally to lean towards a bike (start had the ball in the vertical direction and are therefore very difficult to balance). When you learn to do you are to reinforce this natural tendency to wheels, which explains why it is not so difficult to ride "hands off".

A thing called angular momentum (gyroscopic effect) helps.
The wheel tends to stay and do what he does!
Similarly, when you're on a bike your body is stronger and slow to react to a force imbalance. Note also that when you put in front of you intitially guide to how you want to go, then drop a bit before turning the handlebars to the place where you want to go! You actually use dynamically you throw on the side before turning begins

Not impossible, just more difficult. The gyroscopic effect that occurs when the wheels are spinning works to stabilize the bike. This is not in play when the bike is stopped.

While reiterating and synthesis, but it can be done with a little practice, it is not impossible. A frequent response is that the wheels act like gyroscopes for stability. If this is true, is negligible. The ease of balance at high speed are very small (and unconscious) rotates to begin in the fall, producing a balance.