An American football, a Rugby football and an Aussie rules ball are all prolate spheroids (pointed ovals). A soccer ball is a sphere.
An American football, a rugby football and an Aussie rules ball are all prolate spheroids (pointed ovals). A soccer ball is a sphere.
A ball has the shape known in mathematics as a sphere. (Unless it's an American football.)
The shape of the football was changed from the shape used in rugby to a prolate spheroid in 1897. Cllick on the 'History of the Football' link below to read about the evolution of the ball used in American football.
The football was round at first like an ball, but i don't know how it became the shape it is today! The ball used in American football was modeled after the rugby ball. Rugby originally used a round ball, but it gradually flattened out into an egg shape, which allowed for easier handling and carrying. The rugby ball was at this stage of development when American football came along. The modern rugby ball is still a little fatter than the modern football and more rounded at the ends to allow for good bounces on dropkicks. After the forward pass was legalized, the American ball gradually became skinnier and pointier at the ends. These design changes made the ball more aerodynamic and easier for the thrower to handle.
Rugby/American Football - Prolate Spheroid Association Football - Sphere Old style World Cup ball - Truncated Icosahedron
football
The ball used in Gaelic Football is round.
Eric Ball - American football - was born on 1966-07-01.
Michael Ball - American football - was born on 1964-08-05.
Jason Ball - American football - was born on 1979-03-21.
An American football is the same shape as a rugby ball. A football is slightly smaller and is more pointed whereas a rugby ball is rounder in overall shape. A football skin is rougher to make it easier to be carried and can be leather whereas a rugby ball is slightly smother for aerodynamics (kicking and passing ) of a synthetic rummer outer panelled skin and a silicone bladder which is inflated to give the ball its shape. The size, weight and construction materials of a rugby ball is very closely monitored by the NRL and IRB Boards.