The discussion revolves around the effect of a pulley on the free body diagram of a beam subjected to a load. Participants explore the implications of introducing a pulley system in terms of axial loads, tension forces, and equilibrium conditions, focusing on both theoretical and practical aspects of statics.
Participants express differing views on the specifics of the axial force and its calculation, indicating that the discussion remains unresolved regarding the exact magnitude and implications of the forces involved.
Participants have not reached a consensus on the magnitude of the axial force in the beam, and there are unresolved aspects regarding the assumptions made in the free body diagrams and equilibrium equations.
Can you explain what the magnitude of that force would be, and why?PhanthomJay said:
As always, use free body diagrams and the equilibrium equations. The tension in a rope passing through an ideal pulley is the same on both sides of the pulley. So the force of the wall on the rope must have a magnitude of T, acting left. By summing external forces of the system in the x direction = 0, the horizontal force of the wall on the beam must also be T, acting right, since that it is the only place where another external force can exist. The shear and moment values in the beam are the same as in the first case.dmk90 said: