1) A particle covers half of the circle of radius r. Then the displacement and distance of the particle are respectively A) $2\pi r, 0$ B) $2r, \pi r$ C) $\frac{\pi r}{2}$, 2r D) $\pi r, r$ Answer: Option BExplanation:When a particle cover half of the circle of radius r, then the displacement is AB = 2r Distance = half of circumference of circle = πr
