1.5. Terminal Fall Velocity

Try these first

1. 1.

   Define terminal velocity.

   Hint

   Look for key forces acting on the object.

2. 2.

   What is Stokes' law used for?

   Hint

   Think about fluid resistance.

3. 3.

   What is terminal velocity?

   Hint

   Recall the definition discussed.

4. 4.

   True or False: Terminal velocity increases with the size of the object.

   • True
   • False

   Hint

   Consider both weight and drag in your response.

5. 5.

   Calculate the terminal velocity for a 0.1 m diameter sphere in glycerin (viscosity 1 Pa.s) with density 1200 kg/m³.

   Hint

   Ensure to find density of the fluid first, then apply the values correctly.

6. 6.

   Explain how terminal velocities change with the increase of fluid density.

   Hint

   Reflect on pressure differences and equilibrium.