Two particles describes the same circle of radius `a` in the same sense with the same speed `v`. What is their relative angular velocity?

A: Two particles starts from the rest simultaneously and proceed with the same acceleration in the same direction. The relative velocity of these particles will be zero throughout motion. R: At every moment the two particle will have the same velocity.

Two particles of equal mass are moving along the same line with the same speed in the same direction. What is the speed of the centre of mass of the system ?

Two particles of equal mass are moving along the same line with the same speed in the same direction. What is the speed of the centre of mass of the system ?

Two particles of equal mass are moving along the same line with the same speed in the same direction. What is the speed of the centre of mass of the system ?