Question:
The dynamic lift due to the spinning of a ball in a fluid can be explained by:
The dynamic lift due to the spinning of a ball in a fluid can be explained by:
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Always associate the "spinning of a ball in a fluid" with the Magnus effect.
This is a standard real-world example used in fluid mechanics courses to explain curved balls in sports.
This is a standard real-world example used in fluid mechanics courses to explain curved balls in sports.
Updated On: Jul 22, 2026
- Bernoulli's Principle
- Pascal Law
- Archimede's Principle
- Magnus effect
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
The question asks for the physical phenomenon or effect that explains the dynamic lift experienced by a spinning ball moving through a fluid.
Step 2: Key Concept and Approach:
A spinning ball drags air/fluid with it.
As the ball moves forward, the air velocity relative to the ball's surface is higher on one side (where the spin direction aligns with the airflow) and lower on the opposite side.
By Bernoulli's theorem, this velocity difference creates a pressure difference, generating a net lateral force.
Step 3: Detailed Explanation:
• Magnus Effect: This physical phenomenon is known as the Magnus effect.
It represents the generation of a sidewise force on a spinning cylindrical or spherical solid immersed in a fluid when there is relative motion.
• Fluid Dynamics:
The air travels faster on the side where the rotation is in the same direction as the wind, resulting in low pressure.
The air travels slower on the side rotating against the wind, creating high pressure.
This pressure difference generates a net upward/lateral lifting force.
• Other Options: Pascal's law deals with transmission of fluid pressure.
Archimedes' principle explains buoyancy.
Bernoulli's principle is the underlying mathematical foundation for the Magnus effect, but the specific biological/physical name of the "spinning lift" effect is the Magnus effect.
Step 4: Final Answer:
The dynamic lift on a spinning ball is explained by the Magnus effect, which corresponds to Option (D).
The question asks for the physical phenomenon or effect that explains the dynamic lift experienced by a spinning ball moving through a fluid.
Step 2: Key Concept and Approach:
A spinning ball drags air/fluid with it.
As the ball moves forward, the air velocity relative to the ball's surface is higher on one side (where the spin direction aligns with the airflow) and lower on the opposite side.
By Bernoulli's theorem, this velocity difference creates a pressure difference, generating a net lateral force.
Step 3: Detailed Explanation:
• Magnus Effect: This physical phenomenon is known as the Magnus effect.
It represents the generation of a sidewise force on a spinning cylindrical or spherical solid immersed in a fluid when there is relative motion.
• Fluid Dynamics:
The air travels faster on the side where the rotation is in the same direction as the wind, resulting in low pressure.
The air travels slower on the side rotating against the wind, creating high pressure.
This pressure difference generates a net upward/lateral lifting force.
• Other Options: Pascal's law deals with transmission of fluid pressure.
Archimedes' principle explains buoyancy.
Bernoulli's principle is the underlying mathematical foundation for the Magnus effect, but the specific biological/physical name of the "spinning lift" effect is the Magnus effect.
Step 4: Final Answer:
The dynamic lift on a spinning ball is explained by the Magnus effect, which corresponds to Option (D).
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