List conditions under which a football may be treated as a point

When you are going to kick the ball it can NOT be considered a Point, because the place of impact on the ball will determine its trajectory. BUT  

after

you kick the ball, you can consider it a point when you plot its trajectory.

the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.

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