(Solved): solve it carefully please this material is mechanics Q.3) Determine the maximum allowable fo ...

Q.3) Determine the maximum allowable force $\mathbf{P}$ that can be applied to the cross section shown in figure. Let the allowable normal stress . Q.4) For the beam and loading shown, determine (a) the equation of the elastic curve for portion $AB$ of the beam, (b) the deflection midway between $A$ and $B$. , (c) the slope at $B$. Use integration method.