Illustration for Coriolis effect article. Special case of the coriolis effect. The force pulling the weights towards the center of rotation is proportonal to the radial distance. The blue arrows represent a torque that is applied. The torque is doing work, increasing the rotational kinetic energy (or draining it). The weights move away from the center of rotation. Thus the increase in rotational energy is absorbed in the form of an increase of the moment of inertia rather than in the form of an increase in angular velocity.