A driver traveling at a speed of 21 ms tops a hill and spots a deer standing in the middle of the road 90 meters away. He hits the brakes and panic stops the car in 8 seconds. How far did the car trav?

To determine how far the car traveled while stopping, we can use the formula for distance under constant acceleration (deceleration in this case). The initial speed is 21 m/s, and the car stops in 8 seconds, which means the final speed is 0 m/s. The average speed during deceleration is (21 m/s + 0 m/s) / 2 = 10.5 m/s. Thus, the distance traveled while stopping is 10.5 m/s × 8 s = 84 meters.