2.1.1. Upward Force

Try these first

1. 1.

   Define upward force in fluid mechanics.

   Hint

   Think about forces that counteract gravity.

2. 2.

   What is capillary action?

   Hint

   Consider how water moves through soil.

3. 3.

   What is the upward force in a fluid system equal to?

   • Weight of the fluid
   • Downward force
   • Surface tension

   Hint

   Consider balance in forces.

4. 4.

   True or False: Capillary rise occurs due to gravitational force alone.

   • True
   • False

   Hint

   Think about what lifts the water in narrow tubes.

5. 5.

   A fluid with a surface tension of 0.072 N/m is in a tube with a diameter of 0.005 m. Calculate the capillary rise.

   Hint

   Ensure to convert diameter to radius first.

6. 6.

   Discuss how varying tube diameters affect capillary rise and provide a real-life example.

   Hint

   Think of plants and soil moisture.