16. - Forces and Shear Stress in Fluids
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Practice Questions
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Define shear stress.
💡 Hint: Think about forces acting along surfaces.
What does viscosity measure?
💡 Hint: Consider how easy it is for liquids to flow.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is shear stress?
💡 Hint: Think about what stress means in physical terms.
True or False: Viscosity measures how well a fluid can resist deformation.
💡 Hint: Recall the definition of viscosity.
2 more questions available
Challenge Problems
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A scale model of a boat has a length of 0.8 m and is tested in water. Given that the dynamic viscosity of water is 1 mPa.s, and you are tasked to find the Reynolds number for a prototype boat of length 20 m at the same speed of 4 m/s.
💡 Hint: Use standard water density of approximately 1000 kg/m³.
An object is moving through a fluid at a velocity where viscous forces equal inertia forces. If the object has a diameter of 10 cm and is experiencing a shear stress of 3 Pa, calculate the force exerted on the object by the fluid.
💡 Hint: Don’t forget to convert diameter into meters.
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