- #1
Elis
- 2
- 0
In free-fall acceleration, how do I figure when "g" is positive or negative?
My textbook is confusing me a bit. In general, when would "g" be positive and when would be negative? I thought it was when the particle was falling downward, it was positive and when it's going upward it's negative, but I seem to have that incorrect.
Somebody also told me that if I have y-coordinate with the bottom portion as positive and the top portion as negative, g would then be positive. However, she said it would also be positive if the reverse occurred. I don't quite understand that.
Could someone please explain this?
No, eq. General question.
Homework Statement
My textbook is confusing me a bit. In general, when would "g" be positive and when would be negative? I thought it was when the particle was falling downward, it was positive and when it's going upward it's negative, but I seem to have that incorrect.
Somebody also told me that if I have y-coordinate with the bottom portion as positive and the top portion as negative, g would then be positive. However, she said it would also be positive if the reverse occurred. I don't quite understand that.
Could someone please explain this?
Homework Equations
No, eq. General question.