A mass on a spring vibrates horizontally on a smooth level surface (see the figure). Its equation of motion is x()-3sin f, where t is in seconds and x in centimeters. Find the velocity at time t. Lonto Ov(t) = sin 3r Ov(1)=2cos 3r O v(1) = cos 31 Ov(t)=3sin 3r Ov(1) = 3cost equilibrium position

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