Question

A person moves on a semicircular track of radius 40 m. If he starts at one end of the track and reaches the other end, find the distance covered and magnitude of displacement of the person.

Answer 1

Distance = path length = `(1)/(2) xx ` circumference
` = (1)/(2) xx 2 pi R = piR = (40 pi ) `m,
Displacement = `|vecd| = 2r = 80` m