A transverse sinusoidal wave on a string is moving in the -x direction. Its speed is 30.0 m/s, and its period is 25.0 ms. At t = 0, a colored mark on the string at x = 0 has a vertical position of 2.00 cm and is moving down with a speed of 1.20 m/s.
1) What is the amplitude of the wave (in m)?
2) What is the phase constant (in rad)?
3) What is the maximum transverse speed of the string (in m/s)?
4) Write the wave function for the wave. (Use the form A sin(kx + ωt + ϕ). Assume that y and x are in m and t is in s. Do not include units in your answer.)