Question

A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of a smooth incline and released. Least time will be taken in reaching the bottom by: (a) The solid sphere (b) The hollow sphere (c) The disc (d) All will take same time

Answer 1

Answer:

A solid sphere, a hollow sphere and a disc, all having the same mass and radeius, are placed at the top of an incline and released. The friction coefficients between the objects and the incline are same and not sufficient to allow pure rolling. The least time will be taken in reaching the bottom by.