$l=2\mathrm{.}5m$

$e=5cm$

$f=5cm$

$g=10cm$

$E=210$GPa

$=1\mathrm{.}2*{10}^{-5}1C$

a$)$ What is the name, symbol and unit of the tipical strain of the beam element under bending?

b$)$ Find the maximum allowable value of the $F$ concentrated force, if the allowable stress is

${}_a=+-120$MPa!

c$)$ Determine the curvature $($specific rotation$)$ of the cantilever at cross$-$section $K!$

d$)$ Determine the normal strain araising at point $B$ of cross$-$section $K$ under the concentrated force

given in question b$).($Give the symbol of the strain with indices, correct sign and unit.$)$

e$)$ What would the curvature of the cantilever at cross$-$section $K$ be if the concentrated force was

replaced by a nonuniform thermal change $T_b=+25C($bottom$),T_t=-25C($top$)?$