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Anton [14]
3 years ago
9

For the wing foil, dtermine the aerodynamic lift. Density

Physics
1 answer:
Brums [2.3K]3 years ago
4 0

The lift is the force generated on a body that travels through a fluid, perpendicular to the speed of the incident current. The mathematical model is given as

F_L = \frac{1}{2} \rho A (V_t^2-V_u^2)

Here,

\rho= Density

A = Cross sectional Area

V_2 =  Upper Velocity

V_1 = Down Velocity

Our values are given as

\rho =1.21 kg/m3.

A= 200m2.

V_2=150m/s

V_1=100m/s

Replacing we have,

F_L = \frac{1}{2} \rho A (V_t^2-V_u^2)

F_L = \frac{1}{2} (1.21) (200) ((150)^2-(100)^2)

F_L = 1512500N

Therefore the areodynamic lift would be 1.512*10^6N

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In other words, the baseball falls as it did before, but the ball is moving so fast that the curvature of the Earth becomes a factor and the Earth "falls away" from the ball. So, theoretically, if a pitcher on a 100 foot (30.48 m) high hill threw a ball straight and fast enough,the ball would circle the Earth at exactly 100 feet and hit the pitcher in the back of the head once it circled the globe! The bad news for the person throwing the ball is that the ball will be traveling at the same speed as when they threw it, which is about 8 km/s or several times faster than a rifle bullet. This would be very bad news if it came back and hit the pitcher, but we'll get to that in a minute.

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