What is the minimum velocity with which a body of mass `m` must enter a vertical loop of radius `R` so that it can complete the loop?

What is the minimum velcoity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop ?

What is the minimum velocity with a body of mass m must enter a vertical loop of radius R so that it can complete the loop ?

A small body is tied to an end of an inextensible string of negligible mass and length r, the other end being clamped to a rigid support. What is the minimum velocity with which the body must be projected horizontally so that it can go completely round a vertical circle without slakening of the string at the highest point ?

The adjoining figure represent a semi-circular loop of charge Q and of radius R .The minimum velocity with which a point mass m of charge -q should be projected so that it becoems free from the influence of the loop is

What is the minimum speed required at the bottom to perform a vertical loop, if the radius of the death-well in a circus is 25m?

In a loop ,a body starts at a height h =2R. The minimum speed with which the body must be pushed down initially in order that it may be able to complete the vertical circle is