A football player runs from his own goal line to the opposing team's goal line, returning to his forty-yard line, all in 20.0 s. Calculate his average speed and the magnitude of his average velocity. (Enter your answers in yards/s.) HINT (a) Calculate his average speed. yards/s (b) Calculate the magnitude of his average velocity. yards/s

A football player runs from his own goal line to the opposing team's goal line, returning to his forty-yard line, all in 20.0 s. Calculate his average speed and the magnitude of his average velocity. (Enter your answers in yards/s.) HINT (a) Calculate his average speed. yards/s (b) Calculate the magnitude of his average velocity. yards/s