A person with a body mass of 65 kg was running over level ground with a strong tailwind, while
wearing a 10 kg weighted vest. The tailwind applied a force of 125 N to the runner’s body in the horizontal
direction. Early in the stance phase, the runner generated a vertical ground reaction force of 1400 N and an
anterior-posterior ground reaction force of -350 N. What was the resultant acceleration of the runner’s center
of mass (magnitude and direction)?
3 answers