Question

The torpedo tube on a submarine is circular, 2.5 feet in diameter, and covered by a door. The center of the torpedo tube is 10 feet below the surface. The submarine is in sea water, which has a specific gravity of 1.04.

a) Where is the vertical center of pressure y_cp of the torpedo tube door under these conditions?

b) What is the average pressure on the door?

c) What is the net force on the door from the water?

d) Assume the door slides to open. If the coefficient of friction between the torpedo tube door and the slide is μ=0.1, how much force will it take to begin to slide the torpedo tube door open? Treat the force due to the water pressure outside as the Normal force on the torpedo tube door. Assume that the pressure in the torpedo tube is 1 atm.

e) If the torpedo tube is flooded by venting it to the water outside, how much force will it take to begin to slide the torpedo tube door open?

Answer 1