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Three particles A,B,C of mass m each are...

Three particles A,B,C of mass m each are joined to each other by massless rigid rods to form an equilateral triangle of side a. Another particle of mass m hits B with a velocity `v_(0)` directed along BC as shown. The colliding particle stops immediately after impact.n The time required by the triangle ABC to complete half revoution in its subsequent motion is `(xapi)/(sqrt(3)V_(0))` where 'x' is

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