Question

If the displacement- time graphs of a particle parallel to (a)displacemnt axis (b) the time axis, what will be the velocity of the particle

Answer 1

when the displacement - time graph is parallel to time axis then velocity is zero
because rate of change of displacement is defined as velocity
but here displacement is constant so difference b/w the final and initial position is zero
but when it is parallel to displacement axis it means time is going on but the time is constant but it not possible that to particle is moving and the time remains constant
so here velocity is not define