A gravity dam has a tringular cross section, with the upstream face vertical and with the impunded water flushed with the crest. The height of the structure is 8 m while its base is 6 m long. If there is no hydrostatic uplift and the friction coeffient between the base and the foundation is 0.80 and the spefcific weight of concrete is 23,540 N/m^3, find the factor of safety against sliding.
a.
2.67
b.
5.24
c.
1.44
d.
2.57