1. The problem statement, all variables and given/known data Another SHM question. Thanks for the help on my first one. The block is at x0 = +5 cm with a positive velocity V0 at time t = 0. Its motion is SHM with amplitude 10 cm and period 2 seconds. If x(t) = Acos(wt + [tex]\varphi[/tex]), the phase constant [tex]\varphi[/tex] should be: 2. Relevant equations x(t) = Acos(wt + [tex]\varphi[/tex]) 3. The attempt at a solution 0.05 = 0.10cos([tex]\pi[/tex] + [tex]\varphi[/tex]) [tex]\varphi[/tex] = 60 - [tex]\pi[/tex] (since the 60 is in degrees...do I just use pi radians = 3.14 radians?) = 57 degrees I got the pi for wt this way btw: wT = 2pi w = 2pi/T = pi (since T = 2) Not sure if I screwed up that or the radians/degrees thing at the end. Any help would be appreciated.