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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 10 - Gravitation > A skylab of mass m kg is first launched from the surface of the earth in a circular orbit of radius 2R(from the centre of the earth) and then it is shifted from this circular orbit to another circular orbit of radius 3R. The minimum energy required to place the lab in the first orbit and to shift the lab from first orbit to the second orbit are.

A skylab of mass m kg is first launched from the surface of the earth in a circular orbit of radius 2R(from the centre of the earth) and then it is shifted from this circular orbit to another circular orbit of radius 3R. The minimum energy required to place the lab in the first orbit and to shift the lab from first orbit to the second orbit are.

If a man at the equator would weigh (3/5)th of his weight the angular speed of the earth is