Answer:
Explanation:
According to Bernoulli's principle
P₁ + 1/2ρ v₁² + ρgh₁ = P₂ + 1/2ρ v₂² + ρgh₂ , ρ is density of air . P₁ , P₂ are pressures at two surfaces .
h₁ = h₂
P₁ - P₂ = 1/2ρ( v₂² - v₁² ) = Lift pressure
ρ of air = 1.225 kg / m³
P₁ - P₂ = 1/2ρ( v₂² - v₁² )
= .5 x 1.225 ( 260² - 170² )
= .5 x 1.225 ( 67600- 28900 )
= 23703.75 N/m²
Lift Force = pressure x area
= 23703.75 x 87
= 2062226.25 N .
