Question

A particle describes a circle of radius r what are the displacement and distance travelled by the particle describes the angles a 90 degree b 180 degree c 36 degree

Answer 1

Displacement is the vector drawn from the initial position to the final position, and its magnitude is equal to the shortest distance between the initial and final positions.

i. Hence, displacement is equal to the diameter of the circle = 2 R.

ii. As initial and final positions are same, i.e., displacement will be zero.

b; Distance is the length of the path travelled by the particle. Hence, distance traveled in case (i) will be equal to πR. Hence, distance traveled in case (ii) will be equal to 2πR