www (a) k =4 kN/m - k-6 kN/m - (b) A 50-kg block moves between vertical guides as shown. The block is pulled 40mm down from its equilibrium position and released. For each spring arrangement, determine a) the period of the vibration, b) the maximum velocity of the block, and c) the maximum acceleration of the block. SOLUTION: For each spring arrangement, determine the spring constant for a single equivalent spring. Apply the approximate relations for the harmonic motion of a spring-mass system.