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To one end of thread thrown over the pul...

To one end of thread thrown over the pulley we suspended load of mass M = 10kg, made from a material of specific gravity 2.5. The mass M is suspended in a container with water. By the other end of the thread we suspended a mass m (see figure). For what minimum value of m (in kg) mass M can float in liquid in equilibrium? Friction negligible everywhere.

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