Question

A submarine is stranded on the bottom of the ocean with its hatch 35m below the...

A submarine is stranded on the bottom of the ocean with its hatch 35m below the surface. Calculate the minimum force (in newtons) needed to open the hatch from the inside, given it is circular and 0.450 m in diameter. Air pressure inside the submarine is 1 atm and the pressure on the ocean’s surface is also 1 atm. Take the density of seawater as 1025 kg/m3 and g=9.8 m/s2.
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Answer #1

Minimum force, F = P x A

F = (1025 x 9.8 x 35) x (pi x 0.225^2)

F = 55915.59 N

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