Can Gravitational force be repulsive? How?????
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Yeah… impossible but not so because if you can imagine it's possible. If a huge mass is concentrated within a very small point under high temperature and pressure, say million times that on sun! Then surprisingly the kinetic energy increases and this as a result the gravitational force act repulsive.
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Yes, Gravitational force can be repulsive if the mass of the object is negative.
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