Question

A circular disk is rotated about its axis which is kept vertical. A straight rough groove is cut into the disk at some distance from the centre.  A particle of some mass moves in the groove. To analyse the motion (or the rest) of the particle in the disk frame, you need to use

(a) a coriolis force

(b) a frictional force

(c) a centrifugal force

(d) a gravitational force

(e) a normal reaction force

Answer 1

No (a) a coriolis force

Yes (b) a frictional force

Yes (c) a centrifugal force

Yes (d) a gravitational force

Yes (e) a normal reaction force