# (See The Wide World of Fluids article titled BowThrusters, Section 5.2.2.) The bow

Chapter 5, Problem 5.77

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QUESTION:

(See The Wide World of Fluids article titled BowThrusters, Section 5.2.2.) The bow thruster on the boat shownin Fig. P5.77 is used to turn the boat. The thruster produces a1-m-diameter jet of water with a velocity of 10 m/s. Determinethe force produced by the thruster. Assume that the inlet and outletpressures are zero and that the momentum of the water entering thethruster is negligible.

QUESTION:

(See The Wide World of Fluids article titled BowThrusters, Section 5.2.2.) The bow thruster on the boat shownin Fig. P5.77 is used to turn the boat. The thruster produces a1-m-diameter jet of water with a velocity of 10 m/s. Determinethe force produced by the thruster. Assume that the inlet and outletpressures are zero and that the momentum of the water entering thethruster is negligible.

Step 1 of 4

But in this case we have flow of water perpendicular on the boat.Look at picture below.

Step  2 of 4

We will determine all forces that operate along the  direction. Now we will apply the linear momentum equation to this fixed control volume.Look at picture above.

Where we have:

Where