Can you offer some help on the following question? I've been trying different things for a while but can't get the right answer. Thanks! At time t = 0, consider a 1/2 wavelength long section of the rope which is carrying the wave y = 0.06 cos(2.1 t - 2.4 x) between two points which have zero displacement (y = 0). Find the total force exerted by the rest of the rope on this section. Neglect any effects due to the weight of the rope. Use the small-angle approximation where q, sin(q), and tan(q) are all approximately equal to each other. A 5 meter length of this rope has a mass of 1.5 kg. What I have so far: I know the horizontal components of the Tensions cancel out, so the net force is due to the Y component of the one of the forces times 2. How do I find that? Thanks a lot!