Body Mechanics of 
      Kicking
  Fastest shot ever 
  recorded  
  https://www.youtube.com/watch?v=MB
  MmJ438R6s
  Force=Mass*Acceleration
  Force=Mass*(Velocity/time)
  F= .43kg*((52.5m/s)/.338 sec)
  F= 66.79 N
  Comparable to getting a punch in the 
  face from an eight year old!!!
  The Force of a Soccer 
  Ball
  Force of an average high school player’s 
  shot:
  0.43kg*15.82/1.04=6.54 N
    The Magnus Effect
    As the ball undergoes top-spin (shown as clockwise rotation in the figure), it causes the velocity of the 
    air around the top half of the ball to become less than the air velocity around the bottom half of the ball. 
    This is because the tangential velocity of the ball in the top half acts in the opposite direction to the 
    airflow, and the tangential velocity of the ball in the bottom half acts in the same direction as the airflow. 
    In the figure shown, the airflow is in the leftward direction, relative to the ball. 
    Since the (resultant) air speed around the top half of the ball is less than the air speed around the 
    bottom half of the ball, the pressure is greater on the top of the ball. This causes a net downward force 
    (F) to act on the ball. This is due to Bernoulli's principle which states that when air velocity decreases, 
    air pressure increases (and vice-versa). 
    Therefore, when a soccer player kicks the ball right of center the ball spins counter-clockwise and the 
    Magnus force acts left, causing the ball to curve left. When the ball is kicked left of center the ball spins 
    clockwise and the Magnus force acts right, causing the ball to curve right. This can result in a ball 
    deviating as much as several feet from the original trajectory by the time it reaches the net. This is no 
    doubt a useful strategy when attempting to make a goal, since it makes the path of the ball less 
    predictable to the goalie as he's preparing to block the shot.