Imagine I stand on a merry-go-round and throw a ball inwards towards the center. The path will make a curve due to the coriolis force. I want to know what explains this. If the ball is thrown inwards, the velocity of the disk gets slower and slower the lower radius as seen from our frame of reference. This will make the ball faster than the rotation. But at the same time, the balls angular momentum should also be conserved, and thus that should also make the velocity greater. Do both these things then contribute to the coriolis force?