Example  -  Internal Forces in Beams (continued)

 

 

             →  Σ Fx  =  0       F2 + P = 0,                      F2 = - P    

 

                  ↑ Σ Fy  =  0          F1 + Q= 0,                 F1 = - Q 

 

    + CCW  Σ MB = 0          MB + P (L/2) -  Q (L/2)  =  0 ,   MB = (Q  -  P) (L/2)

 

 

Axial Force = P,  Shear Force = Q,  Moment = (Q-P)/(L/2)       (result)

 

 

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