Question

In case of bending of a beam, depression $\delta$ depends on Young modulus of elasticity $Y$ as

• A. $\propto Y$
• B. $\propto Y^2$
• C. $\propto Y^{-1}$
• D. $\propto Y^{-2}$

Answer 1

Answer: (C)

$\propto Y^{-1}$

In case of bending of a beam, depression

$\delta$ depends on Young modulus of elasticity $Y$ as

$\delta =\frac{P{L}^3}{48YI}$

$\therefore \delta \propto Y^{-1}$

Depression δ=WL34bd3Y⇒δ∝1Y Depression δ=WL34bd3Y⇒δ∝1