Answer to Question #182206 in Mechanical Engineering for luke

Question

A spring has a stiffness of 100N/m. A mass of 4 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$\pi$(m/k)^1/2 = 2 x 3.14 x (4/100)^1/2 = 1.256 s

5/1.256 = 3.98 the mass is below equilibrium position.