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Figure
2.
"Bending a
Ball" is soccer jargon for the curved path that a ball takes in the air
when
struck
off-center. The Physical forces acting on a ball in the
air can be seen in Figure 2. Since the ball is in
motion in the air (either rising or falling), the normal force, N, is
not equal to the Force of gravity, Fg. There is no
frictional force because the ball is in the air, but there is a drag
attributed to the ball FD.
If
a player were to strike the ball, we would still need the equation: pf=pi (pi=miviand pf=mfvf), but the drag
would be figured into the equation, rather than the friction.