A car has a final velocity of 10 m/s and an acceleration of -2 m/s*. If it has been moving for 8 seconds, what was its displacement? A car moving at 18 m/s slows and is brought to rest at a constant rate in 5 seconds. What was the acceleration? A ball rolls downhill with a constant acceleration of 4 m/s?. If it started from rest, how long will it take to travel 20 meters? A car has a final speed of 10 m/s and an acceleration of 2 m/s". If it has been moving for 8 seconds, what was its initial velocity