(Solved): determine the following:   a. The cracking moment in kp-ft is? b. The self weight of the beam ...

determine the following:
 

a. The cracking moment in kp-ft is?
b. The self weight of the beam in kp/ft is ?
c. The superimposed uniform load that will cause the beam to crack in k/ft is?

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The beam shown in the figure below has the following properties: 28-ft simple span \[ \begin{array}{l} \mathrm{f}^{\prime} \mathrm{c}=4000 \mathrm{psi}, \\ \mathrm{f}_{\mathrm{r}}=7.5 \sqrt{f^{\prime} c} \end{array} \] reinforced concrete weight \( =150 \mathrm{lb} / \mathrm{ft}^{3} \) a. The cracking moment in \( \mathrm{kp}-\mathrm{ft} \) is \[ \begin{array}{l} 53.13636269 \\ 53.12929496 \\ 53.72929496 \\ 53.12626469 \end{array} \] b. The self weight of the beam in \( \mathrm{kp} / \mathrm{ft} \) is \( 0.35 \) \( 0.85 \) \( 0.53 \) \( 0.58 \) c. The superimposed uniform load that will cause the beam to crack in \( \mathrm{k} / \mathrm{ft} \) is