MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Impulsive Forces in Collision

In an experim...

Question

In an experiment on model airplane in a wind tunnel, flow speed on upper & lower surfaces of the wing are $70 m / s$ & $60 m / s$ respectively. Find lift on the wing, if area of wing is $4.0 m^{2}$ and density of air, $ρ_{a i r} = 1.2 k g / m^{3}$ .

A

3120 N

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

4100 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

4500 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

5100 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A 3120 N

Using Bernoulli's theorem,
$L i f t = (P_{2} - P_{1}) A = (\frac{1}{2} ρ V_{1}^{2} - \frac{1}{2} ρ V_{2}^{2}) A = \frac{1}{2} \times 1.2 (70^{2} - 60^{2}) 4 = 0.6 \times (70 - 60) \times (70 + 60) \times 4 = 6 \times 4 \times 130 = 3120 N$

Suggest Corrections

thumbs-up

0

Similar questions

Q. In a test experiment on a model airplane in a wind tunnel, the flow speeds on the upper and lower surfaces of the wing are

70 m s^{- 1}

63 m s^{- 1}

respectively. What is the lift on the wing if its area is

2.5

^{2}

? Take the density of air to be

1.3 k g m^{- 3}

Q. In a test experiment on a model aeroplane in a wind tunnel, the flow speeds on the upper and lower surfaces of the wing are

70 m s^{- 1}

63 m s^{- 1}

respectively. What is the lift on the wing, if its area is

2.5 m^{2}

? Take the density of air to be

1.3 k g m^{- 3}

.

Q. In a test experiment on a model aeroplane in a wind tunnel, the flow speeds of air on the lower and upper surfaces of the wing are

v

\sqrt{2} v

respectively. If the density of air is

ρ

and the surface area of the wing is

A

, the dynamic lift on the wing is given by

Q. In a test experiment on a model aeroplane in a wind tunnel, the flow speed on the upper and lower surfaces of the wings are

v_{1}

v_{2}

respectively. If

ρ

is the density of air, then the upward lift is ( Given: A = cross-sectional area of the wing)

Q. The flow speeds of air on the lower and upper surfaces of the wing of an aeroplane are

v

\sqrt{2} v

respectively. The density of air is

ρ

and surface area of wing is

A

. The dynamic lift on the wing is:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Momentum Returns

PHYSICS

Watch in App

explore_more_icon

Explore more

Impulsive Forces in Collision

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon