Please Help - Rugby Goal Kicking Problem
Hi, can someone please help me with this problem? It states:
Suppose a try is scored at T, then the kicker can kick to the posts from anywhere along the line TF perpendicular to the try line PQ. (Refer to Figure 1) Where is the best place to kick from?
Many kickers seem to think that the further they go back (within their kicking limit) the better. But this is not necessarily the case. The best position for the kick to be taken is clearly where angle ACB subtended by the posts along TF is a maximum.
Here is the diagram:
Basically, I think I have to use trig, and a circle subtending the goal posts, but I'm stuck at that, I have hardly any measurements and angles (the distance between the goal posts is 5.6m.
Thanks for any help,
Calculus unnecessary - easy geometric solution
Or ....... you could recognise that the spot you want will be the point where the circle passing through A and B is >tangent< to the line TF. This follows from a couple of simple circle geometry theorems. Then some trivial algebra to get the distance from the tryline.
Originally Posted by Soroban
By the way ... just passing by and couldn't resist posting the >simple< approach.