A boat is propelled by an hydraulic jet. The inlet scoop has an area of \(0.5 \mathrm{ft}^{2}\), and the area of the exit duct is \(0.20 \mathrm{ft}^{2}\). Since the exit velocity will always be subsonic, pressure equilibrium exists over the exit plane. No spillage occurs at the inlet when the boat is moving through fresh water at \(50 \mathrm{mph}\).

(a) Compute the net propulsive force being developed.

(b) What is the propulsive efficiency?

(c) How much energy is added to the water as it passes through the device? (Assume no losses.)