SOLUTION: As a truck brakes to a stop from 55mph,it covers the length of a football field (300ft) it takes the trucks 15 seconds to come to a stop. How many feet does the truck brake per sec
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Question 1003146: As a truck brakes to a stop from 55mph,it covers the length of a football field (300ft) it takes the trucks 15 seconds to come to a stop. How many feet does the truck brake per second? Answer by mananth(16946) (Show Source):
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As a truck brakes to a stop from 55mph,it covers the length of a football field (300ft) it takes the trucks 15 seconds to come to a stop. How many feet does the truck brake per second?
As a truck brakes to a stop from 55mph,it covers the length of a football field (300ft)=s
it takes the trucks 15 seconds to come to a stop.=t
55mph = 80.67 ft/s
s= ut+1/2 at^2
300 = 80.67*15 +1/2 a (15)^2
300 - 80.67*15 = 1/2 a *225
-910.05 = 1/2 a * 225
2*-910.05/225 = a
a=-8.09
deceleration
