a scientist is studying the biomechanics of the human body she determines the velocity of an experimental subject while he runs along a straight line at a constant rate the scientist the stopwatch at the moment the runner passes a given point and stop it after the runner has passed another point 20 m away the time interval indicated on the stopwatch is 4 s
what is the runner velocity
if the runner continues his motion after the stopwatch is stopped what is his position after 10 s has passed