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A tractor trailer combination has a 24,500 lb tractor and a 12,300 lb trailer. The combination is going down a muddy hill. The tractor has wide, soft tires that float on top of the mud, (rolling resistance 80 lb/ton). The trailer has narrow, hard tires that sink deeply in the mud (rolling resistance = 220 lb/ton). What percent of downhill grade is required for the combination to roll downhill at a constant speed without the application of any rim pull from the engine? Assume the combination is already moving. %3D

A tractor trailer combination has a 24,500 lb tractor and a 12,300 lb trailer. The combination is going down a muddy hill. The tractor has wide, soft tires that float on top of the mud, (rolling resistance 80 lb/ton). The trailer has narrow, hard tires that sink deeply in the mud (rolling resistance = 220 lb/ton). What percent of downhill grade is required for the combination to roll downhill at a constant speed without the application of any rim pull from the engine? Assume the combination is already moving. %3D

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A tractor trailer combination has a 24,500 lb tractor and a 12,300 lb trailer. The combination is going down a muddy hill. The tractor has wide, soft tires that float on top of the mud, (rolling resistance 80 lb/ton). The trailer has narrow, hard tires that sink deeply in the mud (rolling resistance = 220 lb/ton). What percent of downhill grade is required for the combination to roll downhill at a constant speed without the application of any rim pull from the engine? Assume the combination is already moving. !!
Transcribed Image Text:A tractor trailer combination has a 24,500 lb tractor and a 12,300 lb trailer. The combination is going down a muddy hill. The tractor has wide, soft tires that float on top of the mud, (rolling resistance 80 lb/ton). The trailer has narrow, hard tires that sink deeply in the mud (rolling resistance = 220 lb/ton). What percent of downhill grade is required for the combination to roll downhill at a constant speed without the application of any rim pull from the engine? Assume the combination is already moving. !!
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