Practice question
Question
An aircraft (m\=2.2×105kg, wing area 440m2) flies level. What is the pressure difference across the wings? (Take g\=10m/s2)
Explanation
ΔP⋅A = mg. mg = 2.2×105×10 = 2.2×106N, A = 440m2. ΔP = 2.2×106440 = 5000Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5000 Pa. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.