A ball falls off a building which has a height of 100 meters. It hits the
ground 4 seconds later. What is the average velocity of the ball?
![A ball falls off a building which has a height of 100 meters It hits the ground 4 seconds later What is the average velocity of the ball class=](https://us-static.z-dn.net/files/deb/42debf3c5c4d6b38bbd493aaf8d9cd8b.png)