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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does mass conservation imply in a fluid system?
💡 Hint: Think about how fluid flows in and out of a container.
Question 2
Easy
Define momentum in your own words.
💡 Hint: Consider how fast an object is moving and how heavy it is.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the mass conservation principle state?
- Mass can disappear
- Mass in equals mass out
- Mass is always increasing
💡 Hint: Relate it to fluid flowing in and out of a system.
Question 2
True or False: Momentum is conserved in a closed system.
- True
- False
💡 Hint: Think about Newton's laws.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A water jet with a cross-sectional area of 10 cm² and velocity of 25 m/s strikes a flat plate. Calculate the force exerted if the density of water is 1000 kg/m³.
💡 Hint: Use the formula for mass flow rate and then apply it to find the force.
Question 2
A spacecraft has a mass of 20000 kg and is descending at 400 m/s. If it expels gas at 75 kg/s with a velocity of 3000 m/s relative to itself, calculate the thrust and acceleration.
💡 Hint: Use the thrust calculation to determine how quickly the spacecraft decelerates.
Challenge and get performance evaluation