Doubts regarding Strength of material

Replies

• 

  Ambarish Ganesh

  Consider this-
  
  While M is the bending moment, the Shear Force F= Ra-W1-W2
  
  now, when F=0, Ra=W1+W2, which when substituted in M gives you the maximum bending moment, i.e. M=W1a+W2b.
  
  Ok, now let's see why this is maximum. See that the last equation contains no variable (no 'x'), so the rate of change of moment (dM/dx) must be zero for maximum bending moment right? 😀 Now as Moment is constant, differentiating it gives zero. Hence maximum bending moment.
• 

  Ankush Sharma

  The_Wise_Fool

  Consider this-
  
  While M is the bending moment, the Shear Force F= Ra-W1-W2
  
  now, when F=0, Ra=W1+W2, which when substituted in M gives you the maximum bending moment, i.e. M=W1a+W2b.
  
  Ok, now let's see why this is maximum. See that the last equation contains no variable (no 'x'), so the rate of change of moment (dM/dx) must be zero for maximum bending moment right? 😀 Now as Moment is constant, differentiating it gives zero. Hence maximum bending moment.

  ok dear, right description................ but it is numerical one................ but, what if i suddenly ask this question from u?????? means if this question is asked in interview from u, then at that time what will u say?????? waiting...........