An infinity number of point masses each equal to m are placed at x = 1, x = 2, x = 4, x = 8, ..... What is the total gravitational potential at x - 0?

Energy required to move a body of mass m from an orbit of radius 2R to 3R is :

Two spherical bodies of mass M and 5M and radii R and 2R respectively are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller body just before collision is :

Suppose the gravitational force varies inversely as the n^th power of distance. Then the time period of a planet in circular orbit of radius R around the sun will be proportional to :

If the radius of the earth is made three times, keeping its mass constant, then the weight of a body on earth's surface will be as compared to its previous value :

The weight of a body at earth surface is 700 g wt. What will be its weight on a planet whose mass is 1/7 that of earth and radius half that of earth?

The radius of earth is 6400 km and the value of g is 10m/s² . If the weight of 5km body on the equator becomes zero, then the angular speed of earth will be :

If the radius of the earth decreases by 10%, the mass remaining unchanged, what will happen to the acceleration due to gravity?

The kinetic energy needed to project a body of mass m from the earth's surface (radius R) to infinity is :

A satellite is revolving round the earth. Its K.E is E_k. How much would it be made so that the satellite may escape out of the gravitational field of earth?