Question

A spring has a stiffness of 100N/m. A mass of 3 kg was attached to the spring. The mass was pushed 10cm upward from the equilibrium position and was released from rest. After 5 seconds from release, determine if the mass is below or above equilibrium position

Answer 1

$T=2\pi\sqrt{\frac{m}{k}}=2\cdot3.14\cdot\sqrt{\frac{3}{100}}=1.088\ (s)$

$5/1.088=4.59$ the mass is below equilibrium position. Answer