Dear Student,
maximum particle velocity =wA=3
acceleration max=w
2A=9
w=3
A=1
Vwave=20
f=w/2π=3/2π
v=lf
=>l=v/f
=>l=20x2π/3
=>l=40π/3
k=2π/l
=>k=6/40
The equation of the wave form is= Asin(wt-kx)
=sin(3t-6x/40).
Cheers!!
Regards,
Vikas (B. Tech. 4th year
Thapar University)