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A particle of mass M is situated at the centre of a spherical shell of same mass and radius R. The gravitational potential at a point situated at 5 distance from the centre will be
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Particles of masses 2 M, m and 3 M are respectively at points A, B and C with AB=1/4(BC). m is much-much smaller than M and at time t=0, they are all at rest. At subsequent times before any collision takes place
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A body weighs 72N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?
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Acceleration due to gravity on moon is 1/6 of the acceleration due to gravity on earth. If the ratio of densities of earth 
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The gravitational field due to a mass distribution is given by 
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.
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