A smooth hollow cone whose vertical angle is 2alpha with its axis vertical and vertex downwards revolves about its axis eta time per seconds. A particle is placed on the inner surface of cone so that it rotates with same speed. The radius of rotation for the particle is :

A smooth hollow cone whose vertical angle is 2alpha with its axis vert

1.	A smooth hollow cone whose vertical angle is 2alpha with its axis vertical and vertex downwards revolves about its axis eta time per seconds. A particle is placed on the inner surface of cone so that it rotates with same speed. The radius of rotation for the particle is :
Answer» `g cot ALPHA//4pi^(2)eta^(2)` `g SIN alpha//4pi^(2) eta^(2)` `4pi^(2) eta^(2)//g` `g//4pi^(2) eta^(2) sin alpha` ANSWER :a