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CTech2015
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Homework Statement
A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 minutes. How fast in m/s is the car moving after this time?
Homework Equations
DeltaX=1/2(vi+vf)(DeltaT)
Displacement=1/2(initial velocity + final velocity)(Time interval)
The Attempt at a Solution
3.2=1/2(6.4+x)(3.5)
x=-4.6
? Why is this negative? What is the final velocity?