Like the earth, a gyroscope experiences interesting forces when it is spinning. All that's needed to explore gyroscopic forces is a simple spinning disc, as shown in figure 2. However, it's difficult to experience the gyroscopic effects produced by a spinning disc unless it's supported in some way, so you can pick it up and move it around. Figure 3 shows a very simple gyroscope - a disc that can spin around a fixed rod passing through its central bearing. You can experiment with gyroscopes much more easily if they are motorised, and preferably battery-powered.
Angular momentum is a measure of the momentum of an object that is spinning.
The direction of the angular momentum vector h of a spinning object is parallel to the axis of spin, as shown in figure 5. For any independent collection of spinning objects, the total angular momentum must stay constant. This is known as the conservation of angular momentum . Holding the gyroscope horizontally. Conservation of angular momentum can easily be observed if you sit on a swivelly chair while holding a spinning gyroscope.