The pressure inside a commercial airliner is maintained at 1 atm (1.01 × 10^5 N/m2). What is the outward force exerted on a 1.0 m × 2.0 m cabin door if the outside pressure (at 10-km height) is 0.3 atm?
a. 1.4 × 10^2 N
b. 1.4 × 10^3 N
c. 1.4 × 10^4 N
d. 1.4 × 10^5 N
e. 7.0 × 10^3 N
d
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