Question

Suppose that the hatch on the side of a Mars lander is built and tested on Earth so that the internal pressure just balances the external pressure. The hatch is a disk 50.0 cm in diameter. When the lander goes to Mars, where the external pressure is 650 N/m^2, what will be the net force (in newtowns and pounds) on the hatch, assuming that the internal pressure is the same in both cases? Will it be an inward or outward force? Answer= 19.8 kN, 4440 lb. Outward force. Please explain how to get these answers. Equation in textbook : Fnet=(P2-P1)A

can you please explain how you get to final answer?

Answer 1

Imlermal pressure = External pressure an Surface earth External fance is fexternal = Patm X Anda = (1-01 3x 10 Pa) x 77 (0.25)? fexty = 19090:20 N Moco extanal fance on the disk when 94 is on the mash fext = (650 3 X TTX10:25) = 127.63 N '. Met fence an the disk is. fret - 19890:20 - 127.63 = 19 762.57N Fret = 19762.57 N fret = 19.76 KN fret = 19.8 KN @ 44-461b

Please rate
if any mistake in this answer please comment i will clarify your doubt . thank you