A simply supported beam of length L loaded by a UDL of W per length all along the whole span. The value of slope at the support will be [E = modulus of elasticity, I = moment of inertia of section of beam]

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  1. \(\frac{WL^3}{24EI}\)
  2. \(\frac{WL^4}{48EI}\)
  3. \(\frac{WL^3}{48EI}\)
  4. \(\frac{WL^4}{24EI}\)

Answer (Detailed Solution Below)

Option 1 : \(\frac{WL^3}{24EI}\)
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Concept:

For a simply supported beam carrying a uniformly distributed load (UDL) of intensity \( W \) across the full span \( L \), the slope at the supports is given by:

\( \theta = \frac{W L^3}{24 E I} \)

Where:

  • \( W \) = Load per unit length
  • \( L \) = Length of beam
  • \( E \) = Modulus of elasticity
  • \( I \) = Moment of inertia
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