Solve animation movement problem

I am making a simple soccer game. I have a goalkeeper who can dive to save shots.Let's say we have a penalty. My goalie fires two lines to left and right using transform.right and transform.right * -1. I have a line intersection algorithm takes ball movement and calculates where on either of those two lines the ball intersects. That's working, i know where on the line the ball will hit.

So if the intersection point of the ball is 3m away i can move the goalie 3m over a second using Time.deltaTime * 3 but here's the problem, if it's a hard shot the ball is already in the back of the net by the time the goalie arrives at the intersection point. If it's a soft shot he dives gets up and collects the ball.The dive animation takes 0.9seconds. If i divide the distance to intersection point by ball.velocity.magnitude I get a figure like 0.3, or 0.44 - not sure what this is telling me. I'm sure if i knew calculus it would be a breeze. I'm using legacy animation.

Anyone know how might i solve this ?

Thanks
DJ

 

I am too young so It would take 2yrs from now for me to learn calculus.
All the that I can give is that an advice to use mecanim animation system.
If your game is 3d can u please give me the dive and kick anims at my email id - unity3d.pranav@gmail.com
Thanking u in anticipation.