Fluid Dynamics - Drag
- 1.
Using your knowledge on fluid dynamics, identify how the impact of drag on a golf ball during flight can be reduced.
- A.
Altering the shape
- B.
Using the dimple design of the golf ball
- C.
Club selection
- D.
Changing the angle of attack during the swing
Correct Answer(s)
A. Altering the shape
B. Using the dimple design of the golf ballExplanation
Drag, in particular form drag can be seriously reduced by changing the shape of the golf ball and using the dimple design of the ball.Rate this question:
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- 2.
As the ball changes shape during flight, it is said to be ___________.
- A.
Round
- B.
Streamlined
- C.
Optimal
- D.
Longitudinal
Correct Answer
B. StreamlinedExplanation
When the ball changes shape during flight, it is said to be "streamlined." This means that the ball is designed in a way that reduces air resistance and allows it to move through the air more efficiently. A streamlined shape helps the ball maintain a steady and smooth trajectory, making it more aerodynamic. This is important in sports such as soccer or baseball, where the shape of the ball can greatly affect its speed and accuracy when thrown or kicked.Rate this question:
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- 3.
By making the ball more streamlined during flight, it increases the amount of air that omes into contact with ball. This reduces the energy lost from the ball and allows the ball to continue in it's intended state of motion.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
It reduces the amount of air that comes into contact with the ball, and therefore reduces the energy lost from the ballRate this question:
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- 4.
The dimple design assists in creating________
- A.
Lift (through Magnus Effect)
- B.
A boundary layer
- C.
Forward momentum
- D.
Forward spin
Correct Answer(s)
A. Lift (through Magnus Effect)
B. A boundary layerExplanation
The dimples create lift (through Magnus Effect) and create a BOUNDARY LAYER, which uses air at the front of the ball to deflect air molecules awayRate this question:
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- 5.
Wave drag occurs at the interface of _________ fluids
- A.
Three
- B.
Two
- C.
Water
Correct Answer
B. TwoExplanation
Occurs when an object moves at the interface of two fluids i.e. air and waterRate this question:
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- 6.
Wave drag will effect________ of the golf ball
- A.
Velocity
- B.
Spin
- C.
Direction
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
A golf ball in flight (air fluid) comes into contact with rain (water fluid)
This will effect the velocity, spin and direction of the ballRate this question:
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- 7.
How can the effects of wave drag be reduced during ball flight?
- A.
Through the ball changing shape i.e. streamlined
- B.
Increasing the number of dimples on the ball
- C.
Avoid playing during wet conditions!
Correct Answer
A. Through the ball changing shape i.e. streamlinedExplanation
The streamlined effect of the ball is significant reducing the effects of wave dragRate this question:
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Current Version
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Mar 19, 2023Quiz Edited by
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Oct 21, 2012Quiz Created by
Ags2511