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Homework Statement
Two cars approach each other on a straight road. Car A is moving at 16m/s and car B at 8m/s. When they are 45m apart both drivers apply their brakes. Car A slows down at a rate of 2m/s^2 while car B slows down at 4m/s^2. Where and when do the cars collide?
Homework Equations

The Attempt at a Solution

I dont really understand this so i would appreacite if someone could help me