Consider the free-body diagram of the beam shown in Figure P3 .
The beam is in equilibrium. The support reactions are shown, together with the external uniformly distributed load q , applied at the position indicated.

Which of the following correctly represents the moment equilibrium equation about point B ? Take L 1 = 3.5 m , and L 2 = 2.5 m .

Use the sign convention for forces and moments shown in the figure.

Figure P3. Beam free-body diagram

Question

Consider the free-body diagram of the beam shown in  Figure P3 . 
The beam is in equilibrium. The support reactions are shown, together with the external uniformly distributed load  q , applied at the position indicated.

Which of the following correctly represents the  moment equilibrium equation about point B ? Take  L 1  = 3.5 m , and  L 2  = 2.5 m .

Use the sign convention for forces and moments shown in the figure.
  
 Figure P3. Beam free-body diagram

Answer

\sum M_B = 0:\; 6\,A_y - 1.75\,q= 0

Answer

\sum M_B = 0:\; -6\,A_y + 2.5\,q= 0

Answer

\sum M_B = 0:\; 6\,A_y + 3.125\,q= 0

Answer

\sum M_B = 0:\; -6\,A_y + 3.125\,q= 0

Answer

\sum M_B = 0:\; -6\,A_y - 3.125\,q= 0

Answer

\sum M_B = 0:\; 6\,A_y - 3.5\,q= 0

Answer

\sum M_B = 0:\; -6\,A_y + 1.25\,q= 0

Answer

\sum M_B = 0:\; -6\,A_y + 6.125\,q= 0

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Consider the free-body diagram of the beam shown in Figure P3 . The beam is i...

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