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[" 11.Three identical spheres each of ma...

[" 11.Three identical spheres each of mass 'm' "],[" and radius 'R'are placed touching one "],[" another so that their centres A,B and C "],[" lie on a straight line.The position of their "],[" centre of mass from centre of A is "],[[" 1) "(2R)/(3)," () "2R," 3) "(5R)/(3)],[" 12.A boy of mass "50kg" is standing at one end of "," 1) "(800)/(3)]]

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