8.5. Penetration Resistance

Try these first

1. 1.

   What is rolling resistance?

   Hint

   Consider what happens when a wheel rolls on the ground.

2. 2.

   Define penetration resistance.

   Hint

   Think about the effect of weight on soft ground.

3. 3.

   What is penetration resistance?

   • Resistance from rolling over a surface
   • Resistance from sinking into the surface
   • Resistance caused by machine speed

   Hint

   Think about how tires react on soft surfaces.

4. 4.

   True or False: Penetration resistance increases the total rolling resistance.

   • True
   • False

   Hint

   Consider how resistance factors combine.

5. 5.

   A loader weighing 60,000 kg (60 tons) sinks 4 cm into soft soil. What is the additional tractive effort required for this loader due to penetration resistance?

   Hint

   Use the provided formula to find the additional tractive effort.

6. 6.

   During a project in seasonal wet conditions, a 45-ton excavator sinks 5 cm during operations. Discuss the potential impact on overall operational productivity due to penetration resistance.

   Hint

   Reflect on how machinery performance is affected by environmental conditions.