A block of mass m is attached with a massless spring of force constant k. The block is placed over a fixed rough inclined surface, for which the coefficient of friction is 
. The block of mass m is initially at rest. The minimum value of M required to move the block up the plane is (neglect mass of string and pulley and friction in pulley.)
Text Solution
Verified by ExpertsA
Let 
be the maximum extension of spring. The decrease in potential energy of 
increase in elsastic potential energy of spring.
Thus, the maximum extension in spring is
… (i)
For block of mass 
to just move up the incline,
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