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Two people A and B of mass m and 2m are standing at the two ends of the wooden plank of mass 8m. Both people start walking towards each other. Find the ratio of the velocities of A and B so that the plank will remain at rest.

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Two people A and B of mass m and 2m are standing at the two ends of the wooden plank of mass 8m. Both people start walking towards each other. Find the ratio of the velocities of A and B so that the plank will remain at rest.



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