Assignment $1$:

A scraper is operating on an earth haul road which is rutted muddy, no maintenance. The grade from cut to fill is $5\%.$ And the tire is rubber in a high pressure condition.

Calculate the total resistance in both pounds and equivalent grade.

This scraper has a:

EVW $($empty vehicle weight$)$ of $95,550lb$

Rated load of $60,000lb$

$2.$ Determine the efficient speeds $($in $mph)$ and the Rimpull powers $($in lbs$.)$ of the scraper?

$TR=RR+GRor$

$TR=RR-GA$

$1$ ton $=2000lb$

$GR=20($lb$/$ton$)\%$ Grade $$ GVW $($ton$)$

$GA=20($lb$/$ton$)-\%$ Grade $$ EVW $($ton$)$

Solution: