JEE Advanced 2020 Paper 1

A small roller of diameter 20cm has an axle of diameter 10cm (see figure below on the left). It is on a horizontal floor and a meter scale is positioned horizontally on its axle with one edge of the scale on top of the axle (seefigure on the right). The scale is now pushed slowly on the axle so that it moves without slipping on the axle, and the roller starts rolling without slipping. After the roller has moved 50cm , the position of the scale will look like (figuresare schematic and not drawn to scale)