The water in a jet propelled boat is discharged at the back with an absolute velocity of 20 m/s. The cross-sectional area of the jet at the back is 0.02 m2 and the boat is moving in water with a speed of 30 km/hour. Determine : (i) Propelling force on the boat, (ii) Power required to drive the pump, and (iii) Efficiency of the jet propulsion.

Q: a centrifugal pump discharges 300 gpm against a head of 55 ft when the speed is 1500 rpm. The…

A: Given Discharge= 300 gpm Speed= 1500 rpm Brake horsepower =6 Head = 55ft

Q: Mass of the plane: 150,000 kg Initial velocity 0 Final velocity: 100 m/s Distance traveled: 500 m…

A: mass of plane = 150000kg = 1471 kn s = 500m U = 0m/s V = 100m/sec

Q: ertical jet. If there is no energy loss, (Z, - Z,) = h. What is V2 ? Demonstrate that V3 = 0 if Z, –…

A:

Q: .You are required to design a roller coaster with the profile shown in Figure Q2(a). An electric…

A:

Q: A 2 m diameter cylinder rotates at 1800 rpm in an air stream (p=1226 kg/m³) of 25 m/sec. Estimate…

A:

Friction

Friction is defined as the force that prevents any solid surface, any layer of fluid, or any kind of element or material from sliding.