Use free body diagrams

Problem 1: Imagine a taut string which is used to demonstrate e.g., travelling waves. A sensor is attached to the string in two places, the first at x1=0 and the second at x; = 2m, and the vertical position at these points in the string is recorded as a traveling wave goes through the string. The sensors report the following motions: y1(t) = (0.25 rn) sin (311 t) and 3,90) = (0.25 rn) sin (3m + m'B ). From this information, answer the following: (a) What is the frequency of this wave in Hz? (b) What is the wavelength? (c) How fast is the wave traveling? (d) Which direction is it moving in? (Explain)