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Questions and Answers
Pressure is directly proportional to force.
True
Fluid friction acts in the same direction as the motion of the moving body.
False
What is fluid friction?
A force acting opposite to the relative motion of any substance moving in a fluid.
What is a viscous fluid?
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Which of the following statements are true about streamlined bodies? (Select all that apply)
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Provide an example of a streamlined body.
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Honey is more _____ than water.
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What are blunt shaped bodies also known as?
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Study Notes
Pressure and Force
- Pressure is directly proportional to the force applied (weight).
- An increase in surface area results in a decrease in pressure, showcasing an inverse relationship.
Fluid Friction
- A drag force known as fluid friction occurs when a body moves through a fluid.
- Fluid friction acts opposite to the motion of any substance in the fluid.
- This friction arises between fluid layers or between a fluid and a solid surface.
- The viscosity of a fluid causes fluid friction, where thicker fluids resist flow more than thinner ones.
Viscosity
- Viscosity is a measure of a fluid's resistance to flow; thicker fluids like honey have higher viscosity than water.
Resistance and Motion
- Fluids resist motion, leading to friction between a moving body and the fluid's surface.
- Friction levels are influenced by the moving body's shape and the fluid's viscosity, impacting overall drag.
Streamlined vs. Non-Streamlined Bodies
- Bodies designed to reduce fluid friction are called streamlined bodies, featuring shapes that taper to a point and align with fluid flow.
- Examples include fish and airplanes, which are built to enhance speed and reduce drag.
- Non-streamlined bodies, or bluff bodies, have blunt shapes (e.g., a brick) and experience increased fluid friction due to their design.
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Description
Explore the fundamental concepts of fluid mechanics, focusing on the relationship between pressure, force, and surface area. Understand the effects of fluid friction and viscosity in different scenarios. This quiz will test your knowledge of how these principles govern the behavior of fluids in motion.
