A particle moves in a circle of radius r. In half the period of revolution, its displacement and distance covered are

Options

A. `2r, 2pi r `
B. `r l2, pi r `
C. `2r, pi r `
D. `r, pir `

Answer

C

Explanation

Distance travelled by particle in circular path = length of semicircular path `= 1/2 xx` circumferene `= 1/2 xx 2 pi r= pi r ` and magnitude of displacement = distance between the opposite point on smicircular path = 2 r.