6.1.2. Momentum Influx and Outflux Components

Try these first

1. 1.

   Define momentum influx.

   Hint

   Think about direction of momentum.

2. 2.

   What principle does Reynolds transport theorem relate?

   Hint

   Consider both volume and surface flows.

3. 3.

   What does momentum influx refer to?

   • Momentum out of a volume
   • Momentum into a volume
   • Total momentum

   Hint

   Think about fluid flow direction.

4. 4.

   The Reynolds transport theorem relates momentum change to what?

   • True
   • False

   Hint

   Consider the definition of flux.

5. 5.

   A jet with a mass flow rate of 2 kg/s impacts a plate at 15 m/s. Find the force exerted on the plate if the water exits the system at 5 m/s.

   Hint

   Use momentum change principles.

6. 6.

   For a venturimeter with a large cross-section of 0.2 m² and a small cross-section of 0.05 m², calculate the velocity of the fluid if the flow is 40 L/s.

   Hint

   Utilize the area and flow rate relationships.