how does a gyroscope work?
http://www.aviationgroundschool.com/sample_pages/gyro.html...read it .I think that you can get all thing about gyroscope..
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the link works but does not really explain the physics behind the nature of a gyroscope
conservation of angular momentum. In physics there are a few strict conservation laws, and they are very powerful concepts. Conservation of angular momentum is one of them. Once a gyroscope is spinning, it has angular momentum, which is a vector with both direction and magnitude. The direction of the angular momentum vector will not change unless a net torque is applied to the system. An isolated gyroscope has no choice but to "stand up," if it wants to exist in our universe. Of course in the real world of real physical gyroscopes there are always things like friction in the bearings that will slow down the rate of spin and therefore change its angular momentum. Simple answer: conservation of angular momentum. In physics there are a few strict conservation laws, and they are very powerful concepts. Conservation of angular momentum is one of them. Once a gyroscope is spinning, it has angular momentum, which is a vector with both direction and magnitude. The direction of the angular momentum vector will not change unless a net torque is applied to the system. An isolated gyroscope has no choice but to "stand up," if it wants to exist in our universe. Of course in the real world of real physical gyroscopes there are always things like friction in the bearings that will slow down the rate of spin and therefore change its angular momentum.
You should find this lecture of interest: http://www.youtube.com/watch?v=zLy0IQT8ssk
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