Two spheres of masses m and M are situated in air and the gravitational force between them is F.  The space around the masses is now filled with a liquid of specific gravity 3.  The gravitational force will now be

A ball is dropped from a satellite revolving around the earth at a height of 120 km. The ball will

The escape velocity from the surface of the earth is v_e. The escape velocity from the surface of a planet whose mass and radius are three times those of the earth, will be

A rubber ball is dropped from a height of 5 m on a planet where the acceleration due to gravity is not known. On bouncing it rises to 1.8 m. The ball loses its velocity on bouncing by a factor of 

The period of revolution of planet A around the sun is 8 times that of B. The distance of A from the sun is how many times greater than that of B from the sun ?

The mean radius of earth is R, its angular speed on its own axis is ω and the acceleration due to gravity at earth's surface is g. What will be the radius of the orbit of a geostationary satellite?

The figure shows elliptical orbit of a planet m about the sun S.  The shaded area SCD is twice the shaded area SAB.  If t₁ is the time for the planet to move from C to D and t₂ is the time to move from A to B, then

The escape velocity from earth is 11.2 km/s. If a body is to be projected in a direction making an angle 45^o to the vertical, then the escape velocity is

The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B,  A man jumps to a height of 2 m on the surface of A.  What is the height of jump by the same person on the planet B ?

What will be the formula of the mass in terms of g, R and G? (R = radius of earth)