A runner’s position along a straight track is measured to be 12 m at , 16 m at

PHYSICS · Subjective · ISC · Physics · Kinematics · Kinematics

Problem

A runner’s position along a straight track is measured to be 12 m at

t=6.0\text{ s}

, 16 m at

t=6.5\text{ s}

, and 21 m at

t=7.0\text{ s}

. Use these data to give a numerical estimate of the runner’s instantaneous velocity at

t=6.5\text{ s}

and justify your choice in one sentence.