A two hinged parabolic arch of span $$l$$ and rise h carries a load varying from zero at the left end to $$\omega $$ per unit run at the right end. The horizontal thrust is
A. $$\frac{{\omega {l^2}}}{{4{\text{h}}}}$$
B. $$\frac{{\omega {l^2}}}{{8{\text{h}}}}$$
C. $$\frac{{\omega {l^2}}}{{12{\text{h}}}}$$
D. $$\frac{{\omega {l^2}}}{{16{\text{h}}}}$$
Answer: Option D
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A. $$\frac{2}{3}$$
B. $$\frac{3}{2}$$
C. $$\frac{5}{8}$$
D. $$\frac{8}{5}$$
Principal planes are subjected to
A. Normal stresses only
B. Tangential stresses only
C. Normal stresses as well as tangential stresses
D. None of these
A. $$\frac{{\text{M}}}{{\text{I}}} = \frac{{\text{R}}}{{\text{E}}} = \frac{{\text{F}}}{{\text{Y}}}$$
B. $$\frac{{\text{I}}}{{\text{M}}} = \frac{{\text{R}}}{{\text{E}}} = \frac{{\text{F}}}{{\text{Y}}}$$
C. $$\frac{{\text{M}}}{{\text{I}}} = \frac{{\text{E}}}{{\text{R}}} = \frac{{\text{F}}}{{\text{Y}}}$$
D. $$\frac{{\text{M}}}{{\text{I}}} = \frac{{\text{E}}}{{\text{R}}} = \frac{{\text{Y}}}{{\text{F}}}$$
A. $$\frac{{\text{M}}}{{\text{T}}}$$
B. $$\frac{{\text{T}}}{{\text{M}}}$$
C. $$\frac{{2{\text{M}}}}{{\text{T}}}$$
D. $$\frac{{2{\text{T}}}}{{\text{M}}}$$
Horizontal Truss, H = WL^2 / 8h , for three hing arch
And H = WL^2 / 16 h , for two hing arch