2. Water flows in a rectangular channel that is 3.0m wide as shown in Fig. 1. The upstream depth is 70mm, and the water surface rises 40mm as it passes over a portion where the channel bottom rises 10mm. If viscous effects are negligible, what is the flowrate?(20%)

1. A punch for making holes in steel plates is shown in Fig.1a. Assume that a punch having diameter d=20mm is used to punch a hole in an 8mm plate, as shown in the cross-sectional view (Fig.1b). If a force P=110 kN is required to create the hole, what is the average shear stress in the plate and the average compressive stress in the punch? (20%)

2. Water flows in a rectangular channel that is 3.0m wide as shown in Fig. 1. The upstream depth is 70mm, and the water surface rises 40mm as it passes over a portion where the channel bottom rises 10mm. If viscous effects are negligible, what is the flowrate?(20%)

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