1. The problem statement, all variables and given/known data A particle undergoes simple harmonic with amplitude of 10cm and frequency 5Hz. If it passes through the equilibrium position (x=0) at time t = 0, calculate the position, velocity and acceleration of the particle at t = 3.5m5 ms. 3. The attempt at a solution Given that: A = 0.1m f = 5Hz therefroe w = 2pif = 10pi phase difference = 0. So using the standard: x = Acos(wt+PD) where PD = phase difference. I get x = 0.1m. differentiating this I get: v = -0.34 m/s and again differentiating I get: a = -98.0 m/s^2. However these answers appear to be wrong. Any advice on where I am messing up?