1. A ball is tossed upward at 15 meters / second from a height of 12 meters above the ground.* Assume a uniform downward acceleration of 10 m/s^2 (an approximation within 2% of the 9.8 m/s^2 acceleration of gravity).* How high does it rise and how long does it take to get to its highest point?* 2. Relevant equations 3. I really don't know where to start. When it says assume a uniform downward acceleration of 10m/s^2, does that mean that for every second, the velocity goes down 10m/s? So after the first second, the velocity is now 5m/s?