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Yeah I was thinking the same thing just not sure how I would float the final velocity.

void Update(float dt)
{
Vector3 acceleration;
Vector3 Vi, Vf, W;
Vi.set(5, 20, 10);
Vf.set(400, 200, -900);

acceleration.set(0, -32.2, 0); // acceleration (x,y,z)=(0,-2,0)
...