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Lorico [155]
3 years ago
15

At takeoff, an aircraft travels at 62 m/s, so that the air speed relative to the bottom of the wing is 62 m/s. Given the sea lev

el density of air to be 1.29 kg/m3, how fast must it move over the upper surface to create the ideal lift?
Physics
1 answer:
olganol [36]3 years ago
5 0

Answer:

the aircraft must travel at a speed of <em>73.4 m/s</em> in order to create the ideal lift.

Explanation:

We will use Bernoulli's theorem in order to determine the pressure lift:

ΔP = 1/2 (ρ)(v₂² - v₁²)

the generated pressure lift is ΔP = 1000 N/m²

Therefore,

1000 = 1/2(ρ)(v₂² - v₁²)

v₂² - v₁² = 2000 / ρ

v₂² = (2000 N/m² / 1.29 kg/m³) + (62 m/s)²

v₂ = √[ (2000 N/m² / 1.29 kg/m³) + (62 m/s)² ]

<em>v₂ = 73.4 m/s </em>

<em></em>

Therefore, the aircraft must travel at a speed of <em>73.4 m/s</em> in order to create the ideal lift.

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I would assume air resistance is negligible and so the acceleration of the package would be approximately 9.81 m/s².

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3 years ago
The velocity of a wave with a wavelength of 4.700 m and frequency of 54.00 Hz is
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How large must the coefficient of static friction be between the tires and road, if a car rounds a level curve of radius 85 m at
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Answer:

0.66

Explanation:

By using the formula

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3 years ago
If you wanted to find the area of the hot filament in a light bulb, you would have to know the temperature (determinable from th
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Answer:

To find out the area of the hot filament of a light bulb, you would need to know the temperature, the power input, the Stefan-Boltzmann constant and <u>Emissivity of the Filament</u>.

Explanation:

The emissive power of a light bulb can be given by the following formula:

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σ = Stefan-Boltzmann constant

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Therefore,

A = E/σεT⁴

So, to find out the area of the hot filament of a light bulb, you would need to know the temperature, the power input, the Stefan-Boltzmann constant and <u>Emissivity of the Filament</u>.

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To cross the river a swimmer chooses the direction minimizing the amount of time spent in the water. The swimmer swims at a cons
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Answer:

304 meters downstream

Explanation:

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The distance downstream the swimmer will reach the opposite shore = 304 m downstream

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3 years ago
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