4.2 - Rolling Resistance
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is rolling resistance?
💡 Hint: Think about how different surfaces impact moving vehicles.
Why might a crawler machine be selected over a wheeled machine?
💡 Hint: Consider the type of terrain where each machine performs best.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is rolling resistance influenced by?
💡 Hint: Think about what aspects affect machinery performance.
True or False: Higher altitude generally results in better machinery performance due to less air density.
💡 Hint: Consider how altitude changes affect engine operation.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Calculate the power requirement for a machine moving over a rocky surface. If the rolling resistance coefficient is 0.05 and the weight of the truck is 10,000 kg, how much power is needed to maintain a speed of 10 m/s?
💡 Hint: Remember to calculate force using the rolling resistance coefficient and the weight.
You have two machines: a wheeled loader rated at 150 horsepower and a crawler loader at 200 horsepower. The wheeled loader struggles to maintain speed on a muddy terrain while the crawler performs efficiently. Discuss the implications of machine selection based on rolling resistance.
💡 Hint: Think about the relationship between horsepower and terrain conditions.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.