17.1.1. Drag and Lift

Try these first

1. 1.

   Define drag in your own words.

   Hint

   Think of it as a resistance to movement.

2. 2.

   What is lift?

   Hint

   Recall how airplanes achieve flight.

3. 3.

   What does drag oppose?

   • Lift
   • Balance
   • Motion

   Hint

   Remember that drag creates resistance.

4. 4.

   True or False: Lift acts parallel to the direction of flow.

   • True
   • False

   Hint

   Think about how wings generate lift.

5. 5.

   Design a streamlined model for a new bicycle that minimizes drag. Describe the shape, angles, and materials you would use, ensuring you consider wind tunnel testing.

   Hint

   Think about designs that minimize the surface area exposed to airflow.

6. 6.

   Calculate the lift force of a wing with a lift coefficient of 1.2, frontal area of 20 m², moving at a speed of 30 m/s in air (density = 1.225 kg/m³).

   Hint

   Substitute values carefully. Check each component of the lift equation.