A light thread is wound on a disk of mass 'm' and other end of thread is connected to a block of mass 'm', which is placed on a rough as shown in fig. The minimum value of coefficient of friction for which block remain at rest, is mu=1//x then x is __________

A light thread is wound on a disk of mass 'm' and other end of thread

1.	A light thread is wound on a disk of mass 'm' and other end of thread is connected to a block of mass 'm', which is placed on a rough as shown in fig. The minimum value of coefficient of friction for which block remain at rest, is mu=1//x then x is __________
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