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A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = (1.6m)*sin (πt + π/3). What is the velocity (in m/s) of the body at t = 1.3 s?

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  1. x = 1.6 (pi)cos(pi*1.3 +pi/3)

    = 5.03 cos (1.63 pi)
    = 5.03 * .397

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