Solve the following question:
Question: A 1.6 kg block on a horizontal frictionless surface is attached to an ideal mass less spring whose spring constant is 190 N/m. The block is pulled from its equilibrium position at z=.00 m to a displacement x = =.080 m and is released from rest. The block then executes simple harmonic motion along the horizontal x-axis.
1- What is the velocity of the block at time t=.40 s?
If possible just a brief explanation how you got the answer?