Assignment #6:
Most Advantageous Field Goal
By Amber Krug
The regulation field goal width
in college football is 18.5 feet.
The distance between the hash marks is 53.3 feet. We want to discover at what yardage
does the kicker have the maximum angle from the hash marks.
LH to RH is the field where
LH is the left hash mark, RH is the right hash mark, and the distance between
the two points is 53.3 feet. LG to
RG is the field goal where LG is the left goal post, RG is the right goal post,
and the distance between LG and RG is 18.5 feet. Because the field goal is beyond the end zone, the distance
between these two lines is 10 yards plus the kicker stands 7 yards back from
the line of scrimmage (51 feet).
The red line begins at the 0-yard mark.
We can determine this angle
by finding the distance of (RG)(RH) since we know (LG)(RG) is 18.5. We can then use the inverse tangent to
discover the degree of the angle.
We can now use the
Pythagorean Theorem to find the length of (RG)(RH).
(RG)(RH) =
sqrt(512 + 17.42)
= sqrt(2601 + 302.76)
= 53.89 feet
Now, letŐs take the inverse
tangent of opposite over adjacent or
tan-1(18.5/53.89)
= 18.95 degrees
So the angle at which a
kicker would have to kick from a hash mark is 18.95 degrees. Using this same process, we can
determine the angle from any yard mark.
Below is a table of some yardages along with all of the figures
necessary to determine the angle.
These were all calculated in Excel.
Yardage
|
Plus 17 yd Difference |
Converted to Feet |
Distance of (RH)(RG) |
Angle (Degrees) |
0 |
17 |
51 |
53.88655 |
18.94806 |
5 |
22 |
66 |
68.25511 |
15.16521 |
10 |
27 |
81 |
82.84781 |
12.5877 |
15 |
32 |
96 |
97.56413 |
10.73689 |
20 |
37 |
111 |
112.3555 |
9.350192 |
25 |
42 |
126 |
127.1958 |
8.275363 |
30 |
47 |
141 |
142.0696 |
7.419189 |
35 |
52 |
156 |
156.9674 |
6.721807 |
40 |
57 |
171 |
171.883 |
6.143174 |
45 |
62 |
186 |
186.8121 |
5.655561 |
Apparently some commentators
argue that the place kicker will have a better angle for the field goal if he
takes a penalty. The above table
illustrates that taking a penalty would not be a good idea.