The discussion focuses on the effect of a pulley on the free body diagram of a beam subjected to a weight of 100 N. It establishes that the tension in a rope passing through an ideal pulley remains constant on both sides, resulting in a horizontal force of magnitude T acting on the beam from the wall. The equilibrium equations confirm that the shear and moment values in the beam remain unchanged, while an additional axial force is introduced in the beam due to the pulley system. The analysis emphasizes the importance of free body diagrams in understanding the forces at play.
PREREQUISITESStudents and professionals in mechanical engineering, structural engineering, and physics who are analyzing forces in static systems, particularly those involving pulleys and beams.
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: