Hi i need help with this question. It is focused on simple harmonic equation and the rest of the assignment uses many question which are structure like this. A mass of 16kg on a spring of k = 9.0N/m passes the midpoint of motion with a velocity of 2.0m/s what is the amplitutde? I am unsure what equation(s) i could use that contains mass, spring contanstant (k), velocity and amplitute or displacement. I would be greateful for any help, thanks in advance.