Three particles A, B and C of equal mass, move with equal speed v along the medians of an equilateral triangle as shown in the figure. They collide at the centroid G of the triangle. After collision, A comes to rest and B retraces its path with speed v. What is the speed of C after collision ? (1) Zero (2) v/2 (3) v (4) 2v
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The answer is 2v. The speed of C after collision is 2v.
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