9. Calculating Tractive Effort

Try these first

1. 1.

   What is tractive effort?

   Hint

   Think about the forces acting on a moving vehicle.

2. 2.

   Define rolling resistance.

   Hint

   Consider the surface and how it affects movement.

3. 3.

   What is the main purpose of calculating tractive effort?

   • To reduce weight
   • To determine fuel efficiency
   • To ensure sufficient power to move equipment

   Hint

   Think about why we need to ensure power in machinery.

4. 4.

   True or False: Rolling resistance is unaffected by surface type.

   • True
   • False

   Hint

   Reflect on your understanding of how different surfaces interact with vehicles.

5. 5.

   A bulldozer weighs 50,000 kg with a rolling resistance of 35 kg per ton and sinks 10 cm into the ground. Calculate the total tractive effort needed to move it.

   Hint

   Calculate rolling resistance first, then add the penetration component.

6. 6.

   Consider a project where a truck with a gross weight of 40 tons moves on a slope. If the grade resistance is rated at 15 kg per ton, how does this affect the tractive effort calculation?

   Hint

   Ensure to consider both components of resistance to get the full picture.