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The assembly consists of two 20-kg bars which are pin connected. The bars are released from rest when θ = 60∘.

The 8-kg disk at C has a radius of 0.5 m and rolls without slipping.


a)      Determine the angular velocity of the bar AB at the instant θ = 30∘ , measured clockwise.

b)     Determine the angular velocity of the bar BC at the instant θ = 30∘ , measured counterclockwise.


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