A rocket is fired from the earth towards the sun. At what distance from the earths centre is the gravitational force on the rocket zero? Mass of the sun = , mass of the earth = . Neglect the effect of other planets etc. (orbital radius = ).
Mass of the Sun,
Mass of the Earth,
Mass of the rocket
Let be the distance from the centre of the Earth where the gravitational force acting on satellite P becomes zero.
From Newton’s law of gravitation, we can equate gravitational forces acting on satellite P under the influence of the Sun and the Earth as: