1. The problem statement, all variables and given/known data The motion of a particle is given by x=(6.0m) cos(0.586t +0.72) a) find amplitude b) find period c) find the first time for t>0 when v=0 d) find the max acceleration e) find the phase at time t = 1.38s 2. Relevant equations T = 2pie/omega v = -A omega sin omega*t a = -A omega^2 cos omega*t 3. The attempt at a solution I got the first 2. amplitude = 6.0m period = 2pie/omega = 10.7s i'm not sure about the next 3: for c) do i use the second equation above and make v = 0 and just solve for t? for d) do i use the third equation? but what do i use for t? e) Phase is looking for the angle, right? Can someone please help me with the last 3? THANKS!