Practice Final Velocity And Force Calculation (4.5.3)

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9 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does the mass conservation equation state?
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Think about the flow of fluids in and out of a system.
Question 2.
What is incompressible flow?
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Consider how gases behave under pressure.
3Question 3.
What does inflow equal in a closed fluid system?
- Outflow
- Weight
- Density
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Think about what happens to fluid in a container.
4Question 4.
Reynolds Transport Theorem helps calculate what?
- True
- False
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Think about how momentum shares relate at system boundaries.
Question 5.
A jet of water with an area of 3 cm² and velocity of 20 m/s strikes a plate moving at 15 m/s. Calculate the force acting on the plate.
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Use mass flow rate concepts and consider the area.
Question 6.
Evaluate the deceleration of a spacecraft that is 15,000 kg and has gases expelled at a rate of 90 kg/s at 2500 m/s to counteract a downward velocity of 600 m/s.
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Consider the thrust force needed to balance the downward momentum effectively.

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