If the angular velocity 0 = 4j 3k rad /s ofthe rotor in Prob. 7/5 is constant in

Chapter 7, Problem 7/24

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If the angular velocity \(\omega_{0}=-4 \mathbf{j}-3 \mathbf{k} \mathrm{rad} / \mathrm{s}\) of the rotor in Prob. 7/5 is constant in magnitude, determine the angular acceleration  of the rotor for (a) \(\Omega=0 \text { and } \dot{\theta}=2 \mathrm{rad} / \mathrm{s}\) (both constant) and (b) \(\theta=\tan ^{-1}\left(\frac{3}{4}\right) \text { and } \Omega=2 \mathrm{rad} / \mathrm{s}\) (both constant). Find the magnitude of the acceleration of point A in each case, where A has the position vector \(\mathbf{r}=0.5 \mathbf{i}+1.2 \mathbf{j}+1.1 \mathbf{k  m}\) at the instant represented.