If h —TOO nun and d= 500 mm and each spring has a constant k =000 N/m, determine the mass...

If h —TOO nun and d= 500 mm and each spring has a constant k =000 N/m, determine the mass m for which the period of small oscillations is (a)0.50 s. (b)infinite. Neglect the mass of the rod and assume that each spring can act in either tension or compression.