The figure above shows a uniform beam of length $L$ and mass $M$ that hangs horizontally and is attached to a vertical wall. A block of mass $M$ is suspended from the far end of the beam by a cable. A support cable runs from the wall to the outer edge of the beam. Both cables are of negligible mass. The wall exerts a force $F_w$ on the left end of the beam. For which of the following actions is the magnitude of the vertical component of $F_w$ smallest?

Question

The figure above shows a uniform beam of length $L$ and mass $M$ that hangs horizontally and is attached to a vertical wall. A block of mass $M$ is suspended from the far end of the beam by a cable. A support cable runs from the wall to the outer edge of the beam. Both cables are of negligible mass. The wall exerts a force $F_w$ on the left end of the beam. For which of the following actions is the magnitude of the vertical component of $F_w$ smallest?(a) Keeping the support cable and block as shown in the diagram.
, (b) Moving the lower end of the support cable to the center of the beam and leaving the block at the outer end of the beam.
, (c) Keeping the lower end of the support cable at the outer end of the beam and moving the block to the center of the beam.
, (d) Moving both the support cable and the block to the center of the beam.
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Rachel · Accepted Answer

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