Questions in Gravitation

Select	Question
	Two sphere of mass 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
	Earth binds the atmosphere because of
	Which of the following statements about the gravitational constant is true
	Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to
	Weightlessness experienced while orbiting the earth in space-ship, is the result of
	If the change in the value of ‘g’ at a height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)
	The time period of a simple pendulum on a freely moving artificial satellite is
	Two planets have the same average density but their radii are ${R_1}$ and ${R_2}$. If acceleration due to gravity on these planets be ${g_1}$ and ${g_2}$ respectively, then
	An iron ball and a wooden ball of the same radius are released from a height ‘h’ in vacuum. The time taken by both of them to reach the ground is
	The correct answer to above question is based on