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Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 1 > Chapter 10 - Gravitation > A point P (R root3, 0, 0) lies on the axis of a fixed ring of mass M and radius R. The rings is located in the YZ plane with its centre at origin O. A small particle of mass m starts from P and reaches O under gravitational attraction only. Its speed at O will be

A point P (R root3, 0, 0) lies on the axis of a fixed ring of mass M and radius R. The rings is located in the YZ plane with its centre at origin O. A small particle of mass m starts from P and reaches O under gravitational attraction only. Its speed at O will be

A point P (R root3 The change in the gravitational potential energy when a body of a mass m is raised to a height nR above the surface of the earth is (here R is the radius of the earth)