- #1
DeathEater
- 46
- 0
Homework Statement
So I know this is a super basic question, but my teacher and I have been going back and forth on this. If a ball is thrown up into the air, with no other forces acting on it, what is its acceleration? Isn't it - 9.8 m/s^2 because it is acting against the force of gravity and slowing down, so it should be NEGATIVE 9.8 m/s^2 right? My teacher keeps saying that if a ball is thrown into the air, the acceleration is 9.8 m/s^2 , and if a ball is dropped then it is NEGATIVE 9.8 m/s^2. So which one is it?