(1). Water (1000 kg/m^3) flows through a horizontal bend an T section as shown.
ID: 2144281 • Letter: #
Question
(1). Water (1000 kg/m^3) flows through a horizontal bend an T section as shown. At section a the flow enters with a velocity of 6m/s, and the pressure 4.8 kPa. At both sections b and c the flow exits the device with a velocity of 3 m/s, and the pressure at these sections is atmospheric (p =0). The cross-sectional areas at a, b, and c are all the same: 0.20 m^2. Find the x-and y-components of force necessary to restrain the section.
(2). A group of friends regularly enjoys white water rafing, and they bring piston water guns to shoot water from one raft to another. One summer they notice that when on placid slack water, after just a few volleys at each other, they are drifting apart. They wonder whether the jet being ejected out of a piston gun as enuough momentum to force the shooter and raft backward. To answer this question,
(A). Sketch a CV, an FD, and an MD for this system
(B). Claculate the momentum flux (N) generated by ejecting wate with a flow rate of 1 gal/s from a cross section of 1.5 in.
Explanation / Answer
Fx = 1000*0.2*6*(6 - 0) = 7200
Fy = 0
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