A body of mass m is situated at a distance 4R above the earth's surface, where R is the radius of earth. How much minimum energy be given to the body so that it may escape
The correct option is B
Potential energy of the body at a distance 4R from the surface of earth
[As h = 4R (given)]
So minimum energy required to escape the body will be mgR5.
A body of mass m is situated at a distance 4Re above the earth's surface, where Re is the radius of the earth. How much minimum energy should be given to the body so that it may escape?
The gravitational potential energy of a body of mass 'm' at the earth's surface −mgRe. Its gravitational potential energy at a height Re from the earth's surface will be (Here Re is the radius of the earth)
A body of mass m kg. starts falling from a point 2R above the earth’s surface. Its kinetic energy when it has fallen to a point ‘R’ above the eart’s surface [R – Radius of earth, M – Mass of earth, G – Gravitational constant]