Asked by Anonymous
A runner covers one lap of a circular track 40.0 in diameter in 63.3 .
For that lap, what was her average velocity?
If she covered the first half-lap in 28.6 , what were her average velocity for that half-lap?
For that lap, what was her average velocity?
If she covered the first half-lap in 28.6 , what were her average velocity for that half-lap?
Answers
Answered by
Prof. Jag
Her avg velocity is zero because her total displacement is zero around any closed path. This is because velocity is a vector quantity that depends on direction. Her average speed is non-zero, depending only on the distance she ran divided by the time. (Distance is a scalar quantity so direction doesn't matter.)
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