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2 cards from this section. Quick, good the night before a test.
What is rolling resistance?
Think about what happens as tires move over a surface.
How do you convert kg to tons?
What is 1000 kg in terms of tons?
What is the primary factor influencing rolling resistance?
Consider what affects how tires roll over a surface.
Grade resistance decreases when driving downhill.
Think about the direction of gravitational force.
A vehicle weighs 20 tons and has a rolling resistance of 30 kg per ton. If it travels on a 6% slope, calculate the total tractive effort required.
Use the formulas for both rolling and grade resistance, then sum them up.
If a machine with a maximum rimpull of 9000 kg faces 2000 kg of rolling resistance and 1500 kg of grade resistance, how much effective pull does it have left?
Calculate total resistance then subtract it from maximum rimpull.
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