Compute each part of given question:
Question: A mass attached to a spring oscillates with a period of 1.23•s and an amplitude of 20•cm. At time t = 0 the mass is at x = +6•cm and is moving in the positive direction. (Away from equilibrium),
Part A: What is the initial phase?
Part B: Where is it at time t = 3.6•s?
I want help to determine what the initial phase.