A runner completes one full lap around a circular track in and stops exactly at the…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A runner completes one full lap around a 400 m400\,\text{m} circular track in 80 s80\,\text{s} and stops exactly at the starting point. Which statement is correct regarding his average speed and average velocity for the lap? (a) Both average speed and average velocity are 5 m s−15\,\text{m}\,\text{s}^{-1}. (b) Both average speed and average velocity are 00. (c) Average speed is 5 m s−15\,\text{m}\,\text{s}^{-1} and average velocity is 00. (d) Average speed is 2.5 m s−12.5\,\text{m}\,\text{s}^{-1} and average velocity is 00.

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