Consider the motion of a sprinter running a 100-m dash. When it is run outdoors, this race is run along a straight-line portion of a track, so it is an example of motion in one dimension. Draw qualitative plots of the position, velocity, and acceleration as functions of time for the sprinter. Start your plots just before the race starts and end them when the runner comes to a complete stop. | Numerade

A sprinter accelerates at the beginning of a 100 -meter race and then tries to maintain maximum speed throughout the rest of the race. a. What external force is responsible for accelerating the runner at the beginning of the race? Explain carefully how this force is produced. b. Once the runner reaches her maximum velocity, is it necessary to continue pushing against the track in order to maintain that velocity? Explain. | Numerade