1. The problem statement, all variables and given/known data A block attached to a horizontal spring of force constant 75 N/m undergoes SHM with an amplitude of 0.15 m. If the speed of the mass is 1.7 m/s when the displacement is 0.12 m from the equilibrium position, what is the mass of the block? k = 75 N v = 1.7m/s @ 0.12m displacement 2. Relevant equations T = 2π√(m/k) T = d/v 3. The attempt at a solution I am having a really hard time figuring this out. This question would be much easier if I could find the velocity when it is at its highest amplitude, because then I would have to multiply the time by two to get the full cycle. But it does not give me that. I have no clue how to find the period in order to complete my equation.