$15\mathrm{.}7$ Figure $15\mathrm{.}49$ shows a slope with an inclination of $=58.$ If $AC$ represents a trial failure plane inclined at an angle $=32$ with the horizontal, determine the factor of safety against sliding for the wedge ABC. Given: $H=6m$; $=19k\frac{N}{m^3},{}^{\text{'}}=21,$ and $c^{\text{'}}=38k\frac{N}{m^2}.$

Figure $15\mathrm{.}49$

$15\mathrm{.}8$ Refer to Problem $15\mathrm{.}7.$ With all other conditions remaining the same, what would be the factor of safety against sliding for the trial wedge ABC if the height of the slope were $9m?$