Question

Distinguish between speed and velocity explain that a body can have zero average velocity but not zero average speed

Answer 1

Average speed is the ratio oftotal distance by TOTAL time taken. As average velocitydepends on displacement and displacement can be zeroif the object returns to initial position . ... Whereas displacement is zero as source and destination is same. Hence A body can have zero average velocity but not zero average speed.

Answer 2

differences between average speed and average velocity are as follows::--
1.average speed is the total distance once covered by an object per unit time whereas average velocity is the total displacement covered by an object within a given time interval.
2.average speed can't be zero while average velocity can be zero in some cases.
3.average speed is scalar quantity but average velocity is vetor quantity.
4.average speed is always positive whereas average velocity can be both positive and negative.


hope it helps you.