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Aerodynamics - HW - PHYS

Total questions: 14

Worksheet time: 13mins

Name
Class
Date
1.

As the water falls from tap, its speed increases and cross sectional area:

a)

Decreases

b)

Increases

c)

become zero

d)

becomes Constant

2.

Turbulent flow is

a)

Unsteady and regular

b)

Steady and regular

c)

Unsteady and irregular

d)

Steady and regular

3.

Water emerges from a horizontal pipe of varying cross section. If it enters to the pipe with a velocity 0.2 m/s where the area of cross section is 0.5 m^2 and leaves at the end of pipe having area of cross section 0.2 m^2, what is the velocity of water coming out of the pipe?

a)

0.2 m/s

b)

0.5 m/s

c)

0.4 m/s

d)

0.25 m/s

4.

Bernoulli’s equation is obtained by applying law of conservation of ___________.

a)

Mass

b)

Energy

c)

Momentum

d)

Force

5.

Water flows through a garden hose with an inner diameter of 2.0 cm at a speed of 3.0 m/s. What is the speed of the water when it exits through a nozzle of diameter 1.0 cm?

a)

12m/s

b)

0.015m/s

c)

0.005m/s

d)

6m/s

6.

Water enters a horizontal pipe of area 0.05 m² with a speed of 2.5 m/s. It then passes through a section where the pipe narrows to 0.02 m². What is the speed of the water in the narrower section?

a)

6.25m/s

b)

0.0025m/s

c)

0.125m/s

d)

1.25m/s

7.

A fluid flows at 1.8 m/s in a section of pipe with area 0.03 m². If the flow speed increases to 4.5 m/s downstream, what is the radius of this circular section?

a)

0.012m

b)

0.06m

c)

1.8m

d)

0.3m

8.

CHALLENGE: A pipe has a cross-sectional area of 0.015 m², and water flows through it at a speed of 4.0 m/s. What is the volume flow rate of the water?

a)

0.06m3/s

b)

267m3/s

c)

0.00375m3/s

d)

1.8m3/s

9.

A pipe has three sections:

  • Section 1: area = 0.04 m², velocity = 2.0 m/s

  • Section 2: area = 0.02 m²

  • Section 3: velocity = 1.0 m/s

Find:
a) Velocity in section 2
b) Area in section 3

a)

a) 4m/s

b) 0.08m2

b)

a) 2m/s

b) 0.04m2

c)

a) 8m/s

b) 0.02m2

d)

a) 4m/s

b) 0.01m2

10.

Where is the air speed greater, above or below the wing?

a)

Above

b)

Below

11.

If the static pressure is lower above the wing and higher below the wing, what will the airplane do?

a)

It will lift

b)

It will sink

c)

Neither lifts nor sinks

12.
The shape of an airplane wing causes the air above the wing to travel slower than the air below the wing.
a)
True
b)
False
13.

CHALLENGE: If a hairdryer blows a stream of air between two soda cans hanging side by side, the soda cans will ____________________.

a)

rise

b)

move away from each other

c)

move towards each other

d)

not move

14.

Where is the static pressure greater, above or below the wing?

a)

Above

b)

Below