Question

Identify the correct statement:
A) For a body motion, average speed can be zero but average velocity can not be zero
B) For a body motion, average velocity can be zero but average speed can not be zero
C) For a body motion, both average velocity and speed can be zero
D) For a body motion, both average velocity and speed can not be zero

Answer 1

Hint:
Here we will use the concept of motion of body, i.e a body while in motion always covers distance and it can't be zero but the displacement can be zero if the object's initial and final position is the same.

Complete step-by-step answer:
Given, the body is in motion So, it covers some distance.
Therefore, we can conclude that the body's average speed can't be zero. Because it has covered some distance while in motion.
But, if the body's initial and final position is the same then it will cover zero displacement while in motion.
Therefore, we can conclude that the body may have average velocity be zero.
Option (B) is correct.

Additional information
Distance of a body can be defined as the magnitude of length covered by the body from one point to another.
Displacement can be defined as the shortest distance from initial position to final position
Distance can be zero if the object at rest
But, Distance can't be zero if the object is in motion
Displacement can be zero while object in motion when the body's initial and final position is the same.
Average speed = total distance /total time taken
Average velocity = total displacement /total time taken

Note
Distance is always greater than or equal to displacement, i.e., distance > displacement.