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  1. R

    Wave Problem (difficult)

    Homework Statement At time t = 0, consider a 1/2 wavelength long section of the rope which is carrying the wave y = 0.08 cos(1.7 t - 2.5 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...
  2. R

    Center of Mass F/m = a

    For some reason I can't seem to figure this question out. I get the feeling it's much easier than I'm making it. But here it is: Ball 1, ball 2, and ball 3 have masses 1 kg, 2 kg, and 3 kg respectively, and are initially arranged at x = 1 m, x = 2 m, and x = 3 m respectively. y = 1 m for...