3. Fluid Mechanics

Try these first

1. 1.

   What does conservation of mass imply in fluid mechanics?

   Hint

   Consider the basic laws of physics regarding mass.

2. 2.

   Define steady flow in the context of fluid mechanics.

   Hint

   Think about how water flows from a tap.

3. 3.

   Which principle states that mass cannot be created or destroyed?

   • Conservation of Energy
   • Conservation of Mass
   • Newton's First Law

   Hint

   Think of how water in a glass doesn't appear to vanish.

4. 4.

   True or False: In steady flow, the fluid properties at a specific point change over time.

   • True
   • False

   Hint

   Consider if you're observing changes in a flowing river.

5. 5.

   A water jet of density 1000 kg/m³ exits a pipe at 5 m/s. Calculate the force exerted on the wall of the pipe if the exit area is 0.2 m².

   Hint

   Think about how to calculate mass flow rate.

6. 6.

   Two fluids at different velocities enter a junction: Fluid A at 3 m/s and Fluid B at 6 m/s. If the cross-sectional areas are known, find the resultant force acting at the junction due to the exiting flow.

   Hint

   Compare areas and how they influence velocity.