9.1. Example Problem on Tractive Effort Calculation

Try these first

1. 1.

   What is tractive effort?

   Hint

   Think about the force used to pull or drive machinery.

2. 2.

   Name one factor affecting tractive effort.

   Hint

   Consider what happens when a wheel rolls on a surface.

3. 3.

   What is tractive effort?

   • Force of Aerodynamics
   • Force required to maintain movement
   • Force to stop movement

   Hint

   Remember it's about keeping something moving.

4. 4.

   True or False: Only rolling resistance affects tractive effort.

   • True
   • False

   Hint

   Think about what happens in soft versus hard ground.

5. 5.

   A backhoe weighs 25 tons, and the rolling resistance is 80 kg per ton. If it's working on a soft soil surface that causes a penetration of 5 cm, calculate the total tractive effort needed.

   Hint

   Add the rolling force to the force from penetration.

6. 6.

   Consider a bulldozer with a gross weight of 60,000 kg, having a rolling resistance of 30 kg/ton. If it sinks by 10 cm in unstable terrain, how much force will be needed to keep it moving?

   Hint

   Use rolling resistance and penetration resistance calculations as separate parts.