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In Fig. 6-52, two blocks, in contact, slide down an inclined plane \( A C \) of inclination \( 30^{\circ} \). The coefficient of kinetic friction between the \( 2.0 \mathrm{~kg} \) block and the incline is \( \mu_{1}=0.20 \) and that between the \( 4.0 \mathrm{~kg} \) block and the incline is \( \mu_{2}=0.30 \). Find the magnitude of the acceleration.
Figure 6-52
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