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## Homework Statement

Two traffic lights are 100m apart. Light 1 being due west from light 2. Car 1 is moving east at a constant speed of 25m/s. When car 1 passes light 1, car 2 starts from rest, west at a constant acceleration of 2.0 m/s². Where do they pass and how long after the light changes do they pass?

## Homework Equations

I was thinking Vf² = Vi² + 2aΔx

## The Attempt at a Solution

Well I tried solving for the final velocity of car 2, since Vf of car 1 would be the same as initial.

Vf² = Vi² + 2aΔx

= 0² + 2(2.0m/s/s)(100)

Vf² = 400

Vf = 20

I'm not sure if this was the right approach but can someone point me in the right direction here?