The center \(O\) of the wheel is mounted on the sliding block, which has an acceleration \(a_{O}=8 \mathrm{~m} / \mathrm{s}^{2}\) to the right. At the instant when \(\theta=45^{\circ}, \dot{\theta}=3 \mathrm{rad} / \mathrm{s}\) and \(\ddot{\theta}=-8 \mathrm{rad} / \mathrm{s}^{2}\). For this instant determine the magnitudes of the accelerations of points \(A\) and \(B\).

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A 400, mm B