Question

Can the average speed of a body in motion be zero? Justify

Answer 1

Explanation:

Average speed is the ratio of total distance by TOTAL time taken. As average velocity depends on displacement and displacement can be zero if the object returns to initial position . ... Hence A body can have zero average velocity but not zero average speed.

Answer 2

Answer:

yes possible for velocity but not for speed

Explanation:

with the particles of a system moves randomly, in such case particles moving upward direction is approximately equal to downward directed particles , similarly right directional particles equal to left side no. of particles , so over all system average velocity will be zero, that why we use Root mean square velocity