(c2) What is the acceleration aB of car B? Include an explicit plus or minus sign along with your numerical an

Question

Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest, maintains a constant acceleration, and covers the distance in the same time as car A.
Both cars cover a distance of 450 m in 220 s. Assume that they are moving in the + x direction.

(c1) What is the algebraic expression for the acceleration aB of car B? Express your answer in terms of the car's displacement L and the time t.
(c2) What is the acceleration aB of car B? Include an explicit plus or minus sign along with your numerical answer.

Answer 1

since car A covered the distance at constant velocity, vA
450=va*220

for car B, since the acceleration is constant, and it started from rest:

L=.5*aB*t^2
to solve:
450=.5*aB*220^2

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