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5 = 13 sin (ωt)
sin (ωt) = 5/13
cos (ωt) = 12/13
v = dy/dt = Aω cos (ωt)
v = A(2π/T) cos (ωt)
v = (13)(2π/(0.1π))(12/13)
v = 240 cm/s
v = 2.4 m/s