1. The problem statement, all variables and given/known data The position of a particle undergoing simple harmonic motion is given by x(t)=35cos(10πt), where x is in millimeters and t is in seconds. Determine the x component of velocity of the particle at t = 0.60 s . 2. Relevant equations v = x/t 3. The attempt at a solution I correctly found the x position at time "t" to be 0.035 m (the hw page corrected it to 35 mm). Wouldn't you just take 0.035 and divide by 0.6 to get 0.0583 m/s? I tried that and 58.3 mm/s and they were both wrong. I only have one more attempt at the solution, any help would be appreciated!