A body of mass m is revolving along a vertical circle of radius r such that the sum of its kinetic speed of the body at the highest point is `sqrt2 rg` then the speed of the body at the lowest point is

A body of mass m is revolving along a vertical circle of radius r such that the sum of its kinetic energy and potential energy is constant. If the speed of the body at the highest point is sqrt (2rg) then the speed of the body at the lowest point is

A body is moving in a verticle of radius r such that the string is just taut at its highest point. (i) The speed of the body at the highest point is sqrt(gr) (ii) The speed of the body at the lowest point is sqrt(5gr) (iii) The speed of the body when the string is horizontal is sqrt(3gr) (iv) The tension in the string is maximum when the body is in the lowest position.

A body is revolving in a vertical circle with constant mechanical energy. The speed of the body at the highest point is sqrt(2rg) . The speed of the body at the lowest point is