1. The problem statement, all variables and given/known data A block of mass 0.678 kilograms is suspended from a spring with a spring constant of 28.6 newtons per meter. When the block is at rest, it is located 1.44 meters above the floor. The block is then set into oscillation by being lifted to a height of 1.83 meters and released. When data is collected, time t = 0 is taken to be when the block is at the lowest point of its motion. Where is the block at 0.69 seconds? Hint: Find the equation of motion. Amplitude: .39m Equilibrium Position (x0): 1.44m Frequency (f) = 1.034 Hz 2. Relevant equations x=A*sin(2*pi*f*t + phi) + x0 The problem said equations of motion so any of the constant acceleration equations could be useful, but I don't see how they would fit in here. 3. The attempt at a solution I tried setting phi to equal zero, and that answer came out to be wrong. I don't really know where to start, I know I need to find phi to get the answer, but I'm not sure how to find it. Note: I don't want the answer, I just need some guidance to getting started. So please don't just post the answer up for me, that won't help on the test, I want to know how to do it, not just the right answer, so no answers, just a place to start would be greatly appreciated, thanks!