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3 cards from this section. Quick, good the night before a test.
Define shear stress.
Think about forces acting along surfaces.
What does viscosity measure?
Consider how easy it is for liquids to flow.
What is shear stress?
Think about what stress means in physical terms.
True or False: Viscosity measures how well a fluid can resist deformation.
Recall the definition of viscosity.
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.
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.
Don’t forget to convert diameter into meters.
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