Problem
A wheel-type tractor-pulled scraper having a combined weight of 172,000 is push-loaded down a 6% slope by a crawler tractor whose weight is 70,000 lb. What is the equivalent gain in loading force for the tractor and scraper resulting from loading the scraper downslope instead of upslope?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.