3- 173.38(a)PghPPPaatmbatm=+=ρ, If the inside pressure on the door equaled Pa, the force on the door would be FAPPghAdoorabdoor=−=()Since the pressure at every point on the door is greater than Pa, Since the pressure at every point on the door is greater than Pa, F >ghAdoor (b)Assume an average bathtub 5 ft long, 2.5 ft wide, and 2 ft high takes about 10 min to fill. ±..±../minVVtVtub=≈××=⇒=×=52255 25 125ft10 minft / min 333(i) For a full room, 7 mh=⇒253221000 kg 9.81 m1 N7 m 2 m1.4 10 Nms1 kg m/sFF>⇒>×⋅The door will break before the room fills(ii) If the door holds, it will take
This is the end of the preview. Sign up
access the rest of the document.