Question

Can a particle pauses non zero speed and zero velocity. Justify your answer.​

Answer 1

Answer:

(b) False. Speed is the magnitude of velocity and the magnitude of non-zero velocity cannot be zero. ... When a particle moves with a constant speed in the same direction, neither the magnitude nor the direction of velocity changes and so acceleration is zero

Answer 2

AnsweR :

Yes, Speed is defined as rate of change of distance, whereas velocity is rate of change of displacement. And displacement of the particle can be zero when particle reaches its starting position, but have traveled some distance.

So, let's take an example:

For above case, let

• Distance = x units
• Displacement = 0 units

⇒ Speed = Distance/Time = x/t units

⇒ Velocity = Displacement/Time = 0/t = 0 units.

Hence , velocity can be zero. But speed may or may not be zero at same time.