A football is thrown to a moving football player. The football leaves the quarterback's hands 1.5 m above the ground with a speed of 15 m/s at an angle 25 degrees above the horizontal. If the receiver starts 10 m away from the quarterback along the line of the flight of the ball when it is thrown, what constant velocity must he have to get to the ball at the instant it is 1.5 m above the ground.
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