Question

A roller is made by joining together two cones at their vertices O. It is kept on two rails AB and CD which are placed asymmetrically (see figure), with its axis perpendicular to CD and its centre O at the centre of line joining AB and CD (see figure). It is given a light push so that it starts rolling with its centre O moving parallel to CD in the direction shown. As it moves, the roller will tend to:

• A. turn right.
• B. to straight.
• C. turn left and right alternately.
• D. turn left.

Answer 1

The correct option is D

turn left.

The roller will turn left as a force of friction will develop on rail AB in the backward direction.