Practice Example Problems On Shear Stress And Terminal Velocity (1.10) - Basics of Fluid Mechanics

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6 sample questions

Question 1.
Define shear stress in your own words.
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Remember the relationship between force and area.
Question 2.
What is terminal velocity?
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Think of falling objects reaching a steady speed.
3Question 3.
What is the unit of shear stress?
- Pa
- N/m²
- kg/m·s²
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Think about how we define pressure.
4Question 4.
Terminal velocity occurs when:
- True
- False
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Remember the forces acting on a falling body.
Question 5.
A raindrop falls through air and reaches terminal velocity of 9 m/s. If the mass of the drop is 0.002 kg, calculate the drag force acting on it.
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Use the weight formula.
Question 6.
A viscous fluid flows between two parallel plates with a 5 mm gap. If one plate moves at 0.1 m/s and shear stress is measured at 200 Pa, calculate the dynamic viscosity.
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Consider the height difference to derive du/dy.

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