Question

A horizontal circular disk is rotating with a constant angular velocity about its axis. There is a groove along one of its diameters and an object is pushed in the groove from some position.

Now, consider two positions A and B in the groove on the two sides of the centre of the disk. At these points the centrifugal force on the object are P_A and P_B respectively and the coriolis force are Q_A and Q_B respectively.

(a) P_A and P_B are in the same direction but Q_A and Q_B are in opposite directions 

(b) P_A and P_B are in opposite directions but Q_A and Q_B are in the same directions.

(c) P_A and P_B are in the same direction and also Q_A and Q_B are in the same directions

(d) P_A and P_B are in opposite directions and also Q_A and Q_B are in opposite directions

Answer 1

No (a) P_A and P_B are in the same direction but Q_A and Q_B are in opposite directions 

No (b) P_A and P_B are in opposite directions but Q_A and Q_B are in the same directions.

No (c) P_A and P_B are in the same direction and also Q_A and Q_B are in the same directions

Yes (d) P_A and P_B are in opposite directions and also Q_A and Q_B are in opposite directions