4. A 5.25 kg mass hangs from a vertical spring whose elastic constant is k = 150, 0N / m. Determine: (a) The maximum velocity and acceleration. b) The potential and kinetic energy when the mass is 9.0 cm from the equilibrium position. 5. Determine the length of a simple pendulum found on the Earth whose frequency is 3/4 Hz. Determine: What would be the period of the same pendulum on Jupiter where gravity is equal to 24.8 m /s^2