1. A ball rolls downhill with a constant acceleration of 4 m/s*. If it started from rest, how long will it take to reach a speed of 20 m/s? 

2. A hall rolls downhill with a constant acceleration of 4 m/s^2. If it started from rest, it's velocity at the end of 3 meters is? 

3. A constantly accelerated body increases in velocity from 10 m/s to 25 m/s in 3 seconds. It's acceleration is? 

4. A car has a final velocity of 10m/s and an acceleration of 2 m/s^2. If it has been moving for 8 seconds, what was its displacement