Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
I agree that this can be a confusing issue, especially with us old
I'm not even sure I would say the y-velocity decreases...it gets less
positive, only the magnitude of the y-velocity decreases, and then of
course increases on the way down. The y-velocity gets less positive
(assuming up is positive) the whole time, which is consistent with the
downward acceleration the whole time.
Much of this hinges on the distinction between something, as in the
value of the y-velocity, and how that quantity is changing. This is not
an easy distinction for students, so any language that can add clarity
about this as well as the vector nature is valuable.