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1 kg object is moving on a horizontal frictionless surface. Its displacement from the origin is given by the equation: x = 3.5 cos[π/2 t + π]. Where is the equation of the acceleration as a function of time? A. a = 8.63 sin[(π/2) t + π] B. a = -8.63 cos[(π/2) t + π] C. a = -8.63 π cos[(π/2) t + π]
Sagot :
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