Question

If a cantilever beam is subjected to a point load at its free end,then the shear force for point load is
1) zero
2) less than load
3) Equal to the load
4) more than the load

Answer 1

The shear force for point load is 1) Zero.

• The shear force at the wall of a cantilever beam actually equals the vertical reaction at the wall.
• The shear force is zero (0) at the beam's free end.
• Shear force is zero at the ends of a simply supported beam.
• Bending moments are also zero at the ends of a simply supported beam.
• Because there is no other reaction/force between the point of application of the load and the support, the shear force under the point load would be equal to the intensity of the point load itself, and the shape of the Shear Force Diagram would simply be a rectangle.

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