This photo portrays projectile motion in multiple ways. First we see the quarter back project the football into the air, in a forward direction. When released, the ball is at a constant horizontal velocity until the receiver catches the ball. The vertical velocity is the only factor that is changing during this action. If thrown correctly the ball should never decrease its horizontal speed, only when it hits the receiver does the speed of the ball change. Now having said that, sometimes wind as well as other weather elements, may effect the way the ball is traveling. For example if it is pouring rain out and the quarter back releases the football -due to weather conditions- it may slip, therefore projecting it in an awkward motion.
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