일반물리학 1 — Rotation: Problem 20

20 An object rotates about a fixed axis, and the angular position of a reference line on the object is given by \(\theta = 0.40e^{2t}\), where \(\theta\) is in radians and \(t\) is in seconds. Consider a point on the object that is 6.0 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?