| I'm not familiar with a problem that uses this terminology, but I would think the "point of impact" would be the place where the position of a function reaches a certain value.
For instance, if the initial position was given as being 80 for a ball being thrown against a wall, then I would think that the point of impact would be when the initial position reached 0.
From a physics perspective, the velocity or acceleration of the ball wouldn't necessarily be approaching 0 as the ball approached the wall, but the velocity and acceleration would change because of a new force applied to the ball (that force being the wall).
At least that's how I would interpret that. |