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In order to reduce the deflection of the I-beam cantilever shown (Figure), a support is to be added at S.
(a) What vertical force at S is needed to reduce the deflection at this point to zero?
(b) What force is needed to cause an upward deflection at S of 5 mm (thereby per- haps reducing the end deflection to a desired value)?
(c) What can you say about the effect of these forces at S on the bending stresses at the point of beam attachment?
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