14.1.1. Conservation of Momentum

Try these first

1. 1.

   Define conservation of momentum.

   Hint

   Think about how momentum is transferred in collisions.

2. 2.

   What is the difference between extensive and intensive properties?

   Hint

   Recall examples like mass for extensive and temperature for intensive.

3. 3.

   What does the conservation of momentum imply in a closed system?

   • Momentum is always increasing
   • Total momentum remains unchanged
   • Momentum can be created

   Hint

   Think about collisions and how momentum behaves.

4. 4.

   True or False: Extensive properties remain constant regardless of how much substance is present.

   • True
   • False

   Hint

   Consider how mass behaves in different scenarios.

5. 5.

   A truck collides with a stationary car. If the truck's mass is 2000 kg and its speed is 10 m/s, find the total momentum before and after the collision if the car's mass is 1000 kg and it moves at 5 m/s after the collision.

   Hint

   Use conservation of momentum where initial equals final.

6. 6.

   Consider a fluid flowing into a control volume. If the fluid has a density of 1000 kg/m³ and flows at 2 m/s in a pipe with a cross-section of 0.5 m². Calculate the mass flow rate entering the control volume.

   Hint

   Recall the formula for flow rate to find the answer.