Practice Force Calculation In Moving Conditions (4.2.2) - Mass Conservation Equation

Practice: Force Calculation in Moving Conditions

Lesson 4.2.2Mass Conservation Equation

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8 questions

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6 sample questions

Question 1.
What does mass conservation state?
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Think of inflow versus outflow.
Question 2.
Define incompressible flow.
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Consider fluids like water under standard conditions.
3Question 3.
What principle states that mass entering a control volume equals mass leaving it?
- A. Mass Conservation
- B. Energy Conservation
- C. Momentum Conservation
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Think about the flow of mass through any system.
4Question 4.
Is the flow of a fluid behave differently depending on whether it is compressible or incompressible?
- True
- False
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Consider how density variations influence flow behavior.
Question 5.
A jet of water strikes a stationary plate at a velocity of 10 m/s with a cross-sectional area of 0.01 m² and density of 1000 kg/m³. Calculate the force acting on the plate due to the jet.
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Focus on applying the momentum change to find the force.
Question 6.
During re-entry, a spacecraft expires propellants at a rate of 1 kg/s with an exit velocity of 2500 m/s. If the spacecraft's mass is 10000 kg and it was descending at 300 m/s, find the thrust and deceleration.
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Remember, thrust affects momentum and deceleration.

4 more questions in this section. Enroll free to practise them all.