2. Trajectory analysis technique
In this section we provide a summary of our trajectory analysis technique. For more details,
as well as access to sample computer codes, we refer the reader to our first paper [1].
2.1. Soccer ball flight physics
While in the air, a soccer ball experiences a gravitational force from the Earth and a force from
the air through which it traverses. The gravitational force is Fg = mg, where the Teamgeist
ball’s mass is m = 0.436 kg and the acceleration due to gravity has magnitude g = 9.8m s−2.
The ball’s weight, mg 4.28N, was taken to be constant.
Though the air exerts a single force on the ball, we take the conventional approach of
splitting that air force into a component called ‘drag’ and a component called ‘lift’. The drag
force is in the direction opposite to the ball’s velocity, v, and has magnitude
2. Trajectory analysis techniqueIn this section we provide a summary of our trajectory analysis technique. For more details,as well as access to sample computer codes, we refer the reader to our first paper [1].2.1. Soccer ball flight physicsWhile in the air, a soccer ball experiences a gravitational force from the Earth and a force fromthe air through which it traverses. The gravitational force is Fg = mg, where the Teamgeistball’s mass is m = 0.436 kg and the acceleration due to gravity has magnitude g = 9.8m s−2.The ball’s weight, mg 4.28N, was taken to be constant.Though the air exerts a single force on the ball, we take the conventional approach ofsplitting that air force into a component called ‘drag’ and a component called ‘lift’. The dragforce is in the direction opposite to the ball’s velocity, v, and has magnitude
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