Practice Differential Force By Unit Volume (3.7)

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11 questions

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6 sample questions

Question 1.
What is a body force?
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Think about forces that act on whole objects.
Question 2.
Give an example of a surface force.
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Consider forces that act on the interface of fluids.
3Question 3.
What is a body force?
- Pressure on a fluid surface
- Force acting throughout the fluid mass
- Shear stress
- Normal stress
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Consider what force acts from a distance on a mass.
4Question 4.
True or False: Surface forces are only exerted on the surface of fluids.
- True
- False
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Think about where the forces apply in a liquid.
Question 5.
Derive the mathematical expression for body forces acting on a fluid element suspended in a gravitational field.
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Think about how density and gravitational pull interact.
Question 6.
Consider a fluid element in a pipe with varying cross-sectional areas. Analyze how the forces acting on the element change as it moves through the pipe.
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Observe how pressures vary as the pipe's diameter changes.

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