2007-10-03 07:39:20 · 6 answers · asked by ♥ Ƹ̵̡Ӝ̵̨̄Ʒ 3 in Science & Mathematics ➔ Mathematics
ellipsoid?
I'm assuming of course you mean American football.
A regular football (soccer ball) is essentially spherical.
2007-10-03 07:47:50 · answer #1 · answered by Dr D 7 · 0⤊ 0⤋
A football is not really an ellipse. The equation of the projection onto
the x/y plane of an ellipse of revolution is (x/a)^2 +(x/b)^2 = 1. where 'a'
and 'b' are the semi-major and semi-minor axes, respectively. The foot ball
is too "pointed" on the ends to be an ellipse according to the definition
above. The general name for objects that have an axis of symmetry, like a
football ignoring the sewing and the laces, is an oval of revolution.
2007-10-03 14:43:33 · answer #2 · answered by Marvin 4 · 0⤊ 0⤋
A football is a prolate spheroid.
2007-10-03 16:05:56 · answer #3 · answered by kevpet2005 5 · 1⤊ 0⤋
spherical shape
2007-10-03 14:46:43 · answer #4 · answered by sasjana 1 · 0⤊ 0⤋
A SOCCER ball is a sphere.
2007-10-07 13:12:21 · answer #5 · answered by Como 7 · 1⤊ 0⤋
I believe it is called a 'superquadric'.
http://en.wikipedia.org/wiki/Superquadrics
http://en.wikipedia.org/wiki/Super_ellipse
2007-10-03 14:43:21 · answer #6 · answered by PMP 5 · 0⤊ 1⤋