What is the algebraic expression for the final velocity vB of car B? Express your answer in terms of the car's

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.

(a1) What is the algebraic expression for the final velocity vB of car B? Express your answer in terms of the car's displacement L and the time t.
(a2) What is the final velocity vB of car B? Include an explicit plus or minus sign along with your numerical answer.

Answer 1

vB=aB*t
since
L=.5*aB*t^2
ab=2*L/t^2
Therefore
vB=.2*L/t

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