ch10-p052 - 52. With counterclockwise positive, the angular...

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52. With counterclockwise positive, the angular acceleration α for both masses satisfies () 22 12 1 2 , mgL mgL I mL mL τα =−= =+ by combining Eq. 10-45 with Eq. 10-39 and Eq. 10-33. Therefore, using SI units, 2 2 2 2 9.8 m/s 0.20 m 0.80 m 8.65 rad/s (0.20 m) (0.80 m) gL L LL == = ++ where the negative sign indicates the system starts turning in the clockwise sense. The magnitude of the acceleration vector involves no radial component (yet) since it is
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