A football player runs from his own goal line to the opposing team's goal line, returning to his twenty-yard line, all in 27.0 s

twenty-yard-line

#1

A football player runs from his own goal line to the opposing team’s goal line, returning to his twenty-yard line, all in 27.0 s. Calculate his average speed and the magnitude of his average velocity. (Assume a 100 yard football field; note that the player’s X-yard line is X yards from his own goal line. Enter your answers in yards/s.)

Answer:

speed=distance/time (100+80)/27=6.67 yds/s, velocity = displacement/time = 20/27=.741yds/s