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3 cards from this section. Quick, good the night before a test.
What is rolling resistance?
Think about how different surfaces impact moving vehicles.
Why might a crawler machine be selected over a wheeled machine?
Consider the type of terrain where each machine performs best.
What is rolling resistance influenced by?
Think about what aspects affect machinery performance.
True or False: Higher altitude generally results in better machinery performance due to less air density.
Consider how altitude changes affect engine operation.
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?
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.
Think about the relationship between horsepower and terrain conditions.
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