A car, moving along a straight stretch of high- way, begins to accelerate at 0.0377 m/s2. It takes the car 34.3 s to cover 1 km.

How fast was the car going when it first began to accelerate?
Answer in units of m/s.

1 answer

d = Vo*t + 0.5*a*t^2 = 1000 m.
Vo*34.3 + 0.5*0.0377*34.3^2 = 1000 m.
34.3Vo + 22.2 = 1000
34.3Vo = 978.
Vo = 28.5 m/s.