Finding amplitude??? SHM problem 1. The problem statement, all variables and given/known data A 245 g mass attached to a horizontal spring oscillates at a frequency of 3.70 Hz. At t =0s, the mass is at x= 4.40 cm and has v_x = -25.0 cm/s. Determine: 2. Relevant equations I got the first two The Period= .27027 s The Angular Frequency= 23.248 rad/s The Amplitude=? m rounded to 5 sig figs The Phase Constant=? rad rounded to 5 sig figs 3. The attempt at a solution I tried using the equation (x)t=Acos([tex]\omega[/tex]t+[tex]\phi[/tex]) and plugged in t=0 and .0440m for x(0) so the answer i got was .0440m but this is wrong. and i can't attempt the phase constant yet because i need the Amplitude for that. Any help is appreciated thanks.