A spring mass systeam is shown in figure, spring is initially unstretched. A man starts pulling the block with constant force `F`. Find
(a) The amplitude and the time period of motion of the block
(b) The `K.E.` of the block at mean position
(c) The energy stored in the spring when the block passes through the mean position

Answer

(a) `(F)/(k), 2pisqrt((M)/(k))`, (b) `(F^(2))/(2k)`, (c) `(F^(2))/(2k)`