Gravitation Tes...

The gravitational P.E. of a rocket of mass 100 kg at a distance of $$10^{7}$$ m from the earths centre is $$-4\times 10^{9}$$   J. The weight of the rocket at a distance of $$10^{9}$$ m from the centre of the earth is :

A sky laboratory of mass $$2\times 10^{3}Kg$$ is raised from a circular orbit of radius 2R to a circular orbit of radius 3R. The work done is (approximately):

The kinetic energy needed to project a body of mass $$m$$ from the earth surface to infinity is

If $$V_{e}$$ is the escape velocity of a body from a planet of mass M and radius R. Then the velocity of the satellite revolving at height h from the surface of the planet will be:

A body of mass 'm' is taken from the earth's surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be -

The ratio of Earth's orbital angular momentum (about the sun) to its mass is $$4.4 \times 10^{15}\ m^{2}\ s^{-1}$$. The area enclosed by the earth's orbit is approximately

At what height, is the value of g half that on the surface of earth? (R = radius of the earth)

Experimental value of G is

Maximum weight of a body is

The weight of an object in the coal mine, sea level and at the top of the mountain are respectively  $$\omega_1 , \omega_2, \omega_3$$ then