Figure 62 Force Diagram with Masses at Each End of of a Pivoted

question 1

Multiple Choice

Figure 6.2 Force diagram with masses at each end of a pivoted bar of length (L+1) m.
-In Fig. 6.2, the normal force N is 20 N and masses m_A and m_B, where m_B = 2m_A, hang in equilibrium at the ends of a uniform bar of mass m_bar = m_A/2 and length (L+1) m, exerting loads w_A and w_B, respectively. What are the values of m_bar and L that give equilibrium?

• A)0.29 kg, 2/7 m
• B)0.29 kg, 5/7 m
• C)2.86 kg, 2/7 m
• D)2.86 kg, 5/7 m

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