A motor cyclist is going in a vertical circle. What is the necessary condition so that he may not fall down ?

A motor cyclist is going in a vertical circle. What is the necessary c

1.	A motor cyclist is going in a vertical circle. What is the necessary condition so that he may not fall down ?
Answer» Solution :The necessary condition that the motor cyclist may not fall down is `(mv^2)/(R) ge mg`. i.e. `ge sqrt(rg)` at the highest POINT and `V ge sqrt(5gr)` at the lowest point.