1. The problem statement, all variables and given/known data Two waves are propagating in a long uniform string of linear mass density μ and tension Fτ. Their equations are: y1=A1cos(k1x-w1t) y2=A2cos(k2x-w2t) Known: λ1 (wavelength of y1), λ2, A1, A2 what is the vertical velocity of the string at x=2m and t=5s? 2. Relevant equations v=sqrt(Fτ/μ)=w/k k=2π/λ standard wave equation and solutions 3. The attempt at a solution just to check I'm on track. what I did was defining: g(x,t)=y1+y2 and finding all the missing varibles (w,k) using formulas. I then differentiated g with respect to t and plugged x=2,t=5 in the derivative is this correct?