A three$-$point bending test is performed on a glass specimen having a rectangular cross section of height $d=4\mathrm{.}1mm(0\mathrm{.}16$ in$.)$ and

width $b=10mm(0\mathrm{.}39in.)$; the distance between support points is $45mm(1\mathrm{.}77in.).$

Part $1$

Excellent!

Compute the flexural strength if the load at fracture is $293N(66l{b}_f).$

${}_{fs}=$

MPa

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Hint

Attempts: $1$ of $3$ used

Using multiple attempts will impact your score.

$25\%$ score reduction after attempt $2$

Part $2$

X Carefully review Section $7\mathrm{.}13.$ Check your mathematics. Did you confuse $b$ and $d?$ Did you use a consistent set of units?

If you are having difficulty with this problem, you may wish to review:

Solving Equations

The point of maximum deflection $y$ occurs at the center of the specimen and is described by

$y=\frac{F{L}^3}{48EI}$

where $E$ is the modulus of elasticity and I is the cross$-$sectional moment of inertia. What is the value of I for this specimen?

$I=$

$m^4$