34 Motion in One DimensionP2.32(a)The time it takes the truck to reach 20 0.m s is found from vvatfi=+. Solving for tyieldstvvafi=−=−=20 002 0010 0...m sm sm ss2.The total time is thus10 020 05 0035 0....ssss++=.(b)The average velocity is the total distance traveled divided by the total time taken. Thedistance traveled during the first 10.0 s isxvt1020 0210 0100==+FHGIKJ()=..m.With abeing 0 for this interval, the distance traveled during the next 20.0 s isxv tati221220 020 00400=+=()()+=..m.The distance traveled in the last 5.00 s isxvt320 0025 0050 0==+FHGIKJ()=...m.The total distance xxxx=++=++=12310040050550 m, and the average velocity isgiven by
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