A small ring is rolling without slipping on the circumference of a large bowl as shown in the figure. The ring is moving down at P_1, comes down to the lower most point P_2 and is climbing up at P_3. Let v↖{→}_\CM denote the velocity of the centre of mass of the ring. Choose the correct statement regarding the frictional force on the ring.

Question

A small ring is rolling without slipping on the circumference of a large bowl as shown in the figure. The ring is moving down at P_1, comes down to the lower most point P_2 and is  climbing up at P_3. Let v↖{→}_\CM    denote the velocity of the centre of mass of the ring. Choose the correct statement regarding the frictional force on the ring.

Examsnet · Accepted Answer

Correct Answer is :  It is opposite to →vCM at P1 and in the same direction as →vCM  at P3.

KVPY SX SB Exam 19-Nov-2017 Question Paper