In a wind tunnel the pressure on the top surface of a model airplane wing is 8.8 × 104 N/m and the pressure on the bottom surface is 9.0 × 104 N/m2. If the area of the top and bottom surfaces of each wing is 2.0 m2, what is the total lift on the model airplane?
A. 2.0 × 103 N
B. 8.0 × 103 N
C. 1.6 × 104 N
D. 3.6 × 104 N
E. 1.0 × 103 N
Answer: B
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