Let's return to Interstates 80 and 680 in rural Iowa, courtesyof Google Earth. (Open Google Earth using the same file as in thePre-Lab, Interstate_80_in_Iowa.kmz. (Do it thesame way you did in the Chapter 1 lab. If you are using Chrome,there should be a button for this file in the lower left corner ofyour screen after you download it. If you are using other browsers,this file is probably in your Downloads folder.)
Starting from a complete stop, a car gets on I-80 at the I-80 andI-680 interchange, then drives to Stuart and continues east. Afterstarting to move, the car accelerates over a distance of 1/4 mile,until reaching 55 miles per hour and continuing to Stuart at thatconstant speed. So between the I-680 interchange and Stuart, thetime and distance can be considered to be composed of twotime/distance parts:
(link) Interstate_80_in_Iowa.kmz (Google maps shows it is 65.5miles from I680 to stuart)
time(1): the time taken accelerating from 0 mph to 55 mph duringthe first 1/4 mile
distance(1): the first 1/4 mile over which the car wasaccelerating
time(2) the time taken to cover the rest of the distance toStuart going at the constant speed 55 mph
distance(2): the rest of the distance to Stuart after the 1st1/4 mile
5.A. What is distance(2), the distance to Staurt after the1st ¼ mile? _______________
5.B.  What is the time time(1) spent accelerating, inunits of hours?___________
5.C. What is the time time(2) spent driving at the constantspeed after the 1st ¼ mile to Stuart? ____________
5.D. - What percentage of the total distance of the trip(distance(1) + distance(2)) between I-680 interchange and Stuartwas spent accelerating?
5.E.  What percentage of the total time of this trip(time(1) + time(2)) was spent accelerating?
