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Let a steel bar of length 'l', breadth '...

Let a steel bar of length 'l', breadth 'b' and depth 'd' be loaded at the centre by a load 'W'. Then the sag of bending of beam is (Y = Young's modulus of material of steel)

A

`(Wl^(3))/(2bd^(3)Y)`

B

`(Wl^(3))/(4bd^(3)Y)`

C

`(Wl^(2))/(2bd^(3)Y)`

D

`(Wl^(3))/(4bd^(2)Y)`

Text Solution

Verified by Experts

The correct Answer is:
B
For the rectangular steel bar, sag of bending of beam is given by `delta = (Wl^(3))/(4b d^(3)Y)` (Theory).
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