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**JDG1317** I Wasn't sure if this is the right place to ask this but it is my Calc 1 homework so here goes:

It don't really have a problem doing the mathematics of these problems but it just doesn't seem logically correct to me.

It makes sense to me in "Falling object" problems that the position function would be s(t)=-16t^2 - initialvelocity + initialposition

But I came acrossed a problem that involves a projectile shot upwards that says to use the same position function.

Since the falling object is accelerating and the projectile is deccelerating, How can they use the same function?