8. Rolling Resistance

Try these first

1. 1.

   Define rolling resistance.

   Hint

   Think about the type of surfaces involved.

2. 2.

   What unit measures rolling resistance?

   Hint

   Refer to the context of measurement in the lecture.

3. 3.

   What primarily defines rolling resistance?

   • The opposition to motion on a surface
   • The support capacity of the surface
   • The friction experienced by tires

   Hint

   Think about what surfaces interact with wheels.

4. 4.

   True or False: Higher tire pressure always decreases rolling resistance.

   • True
   • False

   Hint

   Consider how tires perform in different environments.

5. 5.

   Calculate the total tractive effort for a vehicle weighing 25 tons if the rolling resistance is 45 kg per ton and if the tire penetration is 5 cm.

   Hint

   Break it down into two parts: normal rolling resistance and penetration components.

6. 6.

   Discuss the economic implications of maintaining roads for rolling resistance—how does it affect project budgets?

   Hint

   Think about the long-term operational costs and savings.