Suppose a ball is resting on a rotating disc ( rotating about an axis through its center ). For an observer sitting on the disc, the ball will move radially outward due to centrifugal force. A second observer, standing outside ( in inertial frame ) will see the ball rotating as well as moving radially outward. This means the centrifugal force which exists in non-inertial frame can be observed in an inertial frame also.
Am I right?
This also shows that centrifugal force is 'real', contrary to the popular belief that it is 'fictitious' or 'un-real'.
How to find out locus of the ball as observed from an inertial frame ( combination of a circular and linear motion )?