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[" Two spheres of masses "2M" and "M" ar...

[" Two spheres of masses "2M" and "M" are initially at "],[" rest at a distance "R" apart.Due to mutual force of "],[" attraction they approach each other.When they "],[" are at separation "R/2," the acceleration of the "],[" centre of mass of sphere would be "],[" 1) zero "],[" 2) "8],[" 3) "3g],[" 4) "12g]

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