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An object rotates about a fixed axis, and the angular position of a reference line on...

An object rotates about a fixed axis, and the angular position of a reference line on the object is given by ? = 0.240e8t, where ? is in radians and t is in seconds. Consider a point on the object that is 5.00 cm from the axis of rotation. At t = 0, what are the magnitudes of the point's (a) tangential component of acceleration and (b) radial component of acceleration?

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