*7-16. allow The beam has a square cross section and is made of wood having an allowable shear stress of T - 1.4 ksi. If it is subjected to a shear of V = 1.5 kip, determine the smallest dimension a of its sides. 2 Temps to rise Sunday Fl BID (0) 4 3 2 Q Search F4 40 FS * & % S 6 7 D W E R T Y ப A S ㅁ F G H J Z X C V B N ALT の 日 Σ H FID FII FIE L ALT CTAL [ ] PAUSE V-1.5 kip BELETE BACKSPACE NUM LOCA 7 HOME ENTER F SHIFT END

1. Determine the reaction at supports and forces acting on each member. (5 pts each) 35 kN 60 kN 10 kN 1m 2m -3m -3m 3m 3m 25 kN 50 kN 10 kN

Problem 7 Water is flowing in a channel with a rectangular cross-section. The channel has a uniform width of b 10 m, and it is equipped with a broad-crested weir. The height of flow in a channel far upstream of the weir is h₁ 2 m, while the weir is == hweir = 0.8 m above the bed of the channel. = 1. Assuming the flow over the weir is critical, calculate the flow rate in the channel by iteratively solving for the critical depth he. Perform at least 3 iterations. Did the flow rate converge? 2. Given the water depth immediately downstream of the weir is 90% of the critical depth hc, what is the water depth after the flow experiences a hydraulic jump further downstream? 3. How much energy is dissipated by the hydraulic jump? h₁ hweir Figure 7: A subcritical flow goes over a broad-crested weir, and it experiences a hydraulic jump downstream of the weir. Figure not to scale.