1.3. Penetration Resistance Calculation

Try these first

1. 1.

   What is rolling resistance and how is it calculated?

   Hint

   Think about how weight affects the vehicle's movement!

2. 2.

   If a vehicle has a gross weight of 40 tons and rolling resistance is 20 kg/ton, what is the total rolling resistance?

   Hint

   Use the formula for rolling resistance.

3. 3.

   What is the total rolling resistance for a vehicle weighing 50 tons with a rolling resistance of 28 kg/ton?

   • 1000 kg
   • 1400 kg
   • 1600 kg

   Hint

   Don't forget the basic multiplication!

4. 4.

   True or False: Penetration resistance decreases when the tire sinks deeper into the surface.

   • True
   • False

   Hint

   Consider what happens when a tire sinks more!

5. 5.

   A vehicle with a gross weight of 30 tons experiences a rolling resistance of 45 kg/ton on flat terrain and must travel a 5% slope. Calculate the total resistance.

   Hint

   Calculate rolling and grade resistance separately then add them.

6. 6.

   Explain why knowing grade resistance is important when selecting machinery for a job site with various slopes.

   Hint

   Think of how steep hills can change the machine’s required capability.