Question
A simply supported beam of width 100 mm, height 200 mm and length 4 m is carrying a uniformly distributed load of intensity 10 kN/m. The maximum bending stress (in MPa) in the beam is __________ (correct to one decimal place).
Answer :
30
Maximum bending moment will be at centre.
Maximum B.M.M = wL²/8 = 10*16/8 = 20kNm
(L=4)
Maximum bending stress
σmax = Mymax/I = 20*103*0.1/(0.1*0.2³/12)
= 30*106 N/m² = 30MPa
Copyright © 2025 Test Academy All Rights Reserved