Question: As shown in Figure 3 0 , the illustrated system consists of a rigid bar ? b a r ( O B ) , pivoted

As shown in Figure 30, the illustrated system consists of a rigid bar ?bar(OB), pivoted at O. A massless wire goes from B, around a frictionless pulley at A, over to C, and down to mass m1. The dimensions of the pulleys are negligible. m1=70kg,m2=100kg, and L=2m. What is the acceleration of m1 as the bar passes through the upright vertical position?
As shown in Figure 3 0 , the illustrated system

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