A4 practical: Conservation of angular momentum (Algodoo)
Angular velocity is defined as the product of the moment of inertia and the angular velocity. If no external torques act then the angular momentum of a body will remain constant, this means that if its moment of inertia decreases its angular velocity will increase. This is why the angular velocity of ice skater (Yuna Kim) in the video clip increases when she brings her leg and body closer to her axis of rotation. The...