Three masses {{m}_{1}},,,{{m}_{2}} and {{m}_{3}} are attached to a string pulley system as shown. All three masses are held at rest and then released. To keep {{m}_{3}} at rest, the condition is
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Three masses {{m}_{1}},,,{{m}_{2}} and {{m}_{3}} are attached to a string pulley system as shown. All three masses are held at rest and then released. To keep {{m}_{3}} at rest, the condition is