1. The problem statement, all variables and given/known data An object is undergoing simple harmonic motion. The graph shows the position of the object as a function of time. What is the first time after t = 0 s when the speed reaches a maximum? http://www.learning.physics.dal.ca/dalphysicslib/Graphics/Gtype26/shm.47.jpeg 2. Relevant equations I don't know what equation to use to figure this out. φ = φo + wt perhaps? 3. The attempt at a solution Im told that position at t=0 gives phi_0. But still do not know how to use the equation nor figure out any of the variables. Help is needed!