Two sphere of mass m and M are situated in air and the gravitational force between them is
The atmosphere is held to the earth by
Two identical solid copper spheres of radius R are placed in contact with each other
A satellite of the earth is revolving in a circular orbit with a uniform speed
The tidal waves in the sea are primarily due to
A point mass m is placed inside a spherical shell of radius R and mass
If the distance between two masses is doubled, the gravitational attraction between them
The gravitational force Fg between two objects does not depend on
Force between two objects of equal masses is F
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