Q.Define displacement and distance.

Distance is the actual path length travelled between two instants — a scalar that only ever accumulates, so it is never negative and never decreases. Displacement is the vector difference between final and initial position, equivalently the straight-line distance from the initial to the final position, directed from initial to final. Key contrasts: distance is always positive; displacement can be positive, negative, or zero (e.g. zero for a round trip back to the start); the magnitude of displaceme …