A hollow sphere has radius 6.4 m. Minimum velocity required by a motor cyclist at bottom to complete the circle will be.

In a vertical circular motion, the minimum speed required by the mass to complete the circle is ________

A mass m is tied to a string of length l and is rotated in a vertical circle with centre at the other end of the string. (a) Find the minimum velocity of the mass at the top of the circle so that it is able to complete the circle. (b) Find the minimum velocity at the bottom of the circle corresponding to the above condition.

A motor cyclist in a circus , drives in a vertical loop inside a death well . What is the minimum speed required to complete the vertical circle , without falling down to complete the vertical circle , without falling down at the highest point , if the radius of the death well is 5 m?

A hollow sphere of radius 1m is given a positive charge of 10µC. The electric field at the centre of hollow sphere will be :

A motor cyclist rides in a vertical circle in a hollow sphere of 3m. Find the minimum speed required so that he does not lose contact while the sphere at the highest point.

A motorcyclist rides in vertical circles in a hollow sphere of radius 5 m. Find the required minimum speed and minimum angular speed, so that he does not lose contact with the sphere at the highest point .

A particle of mass m is lying at the centre of a solid sphere of mass M and radius R . There is a turnel of negligible thickness, so that particle may escape. Find the minimum velocity required to escape the particle from the gravitational field of the sphere.