1. The problem statement, all variables and given/known data A car is traveling along a highway with a speed of 25m/s when the driver sees an obstruction 180m directly ahead. It takes the driver 0.80s to react and begin breaking. A) How long will it take the car to stop once brakes are applies, provided the car stops just before the obstruction? B) What is the value of acceleration of the car just before hitting the obstruction? Assume acceleration is uniform. 2. Relevant equations d= v (t) a = v2-v1 / t2 - t1 d = v1(t) + 1/2 a (t2) 3. The attempt at a solution I don't understand how or know how to use two equations with missing variables to find a variable.