Question

Please answer all questions and all parts. Please also provide the correct final units. Thanks!

1. Crew members attempt to escape from a damaged submarine 100m below the surface. What force must be applied to a pop-out hatch, which is 1.05m by 0.70m, to push it out at that depth? Assume that the density of the ocean water is 1025kg/m³?

2a. A car misses a turn, sinks into a shallow lake, coming to rest on its side with the door horizontal and at a depth of 7.0 m. If the area of the car door is 0.64 m², what is the force exerted on the outside of the door by the water? Note: 1 atm = 101 kPa.

2b. What is the force exerted on the inside of the door by the air, assuming the inside of the car is at atmospheric pressure?

Answer 1

1 Cte escapin n from damaged Submaxìne To find Foree appliel to a hakh Densth of ocean water = 10 25 k /s Depth of Sulmarine s loo m | ' roouit the deph of loo h beloo the erf Start wah, we shau And the differen u in instde and outside the coatr. Forru Area R-essure .= 上 Pressure tloom de Densety of ocean , arty arm卡 resSut inde the Submaie 4 The net mu a be tained om ths ddloone ap ~ 스 △F-(AP).CA = 구38307.5

la ar sinkins into a shalbs lake Depth of the ar cohen Comes to Yeston its sale Pressure at thu(Atmosphenc\ , (State qed er e ssure -denS lolooo Pa 636oo Pa or F= PA A: Area of Cav dav =0.64よ Ye eper (69600) (0 64) = 10% 544 N 2h. Foreates on insde of the dor by Inside of the car os at atmosphric pressene Fore exertal on inslde of dear by t ars ven b Fair = RivxA 64 640 N