Question

A body is moving along a circular path of radius r. What is the distance and displacement of the
body, when it completes two and a half revolutions?

​

Answer 1

Explanation:

in one revolution =2πr

in two and half revolution=2πr x 2.5

=5πr

Now

Displacement =2r

Answer 2

Explanation:

I donthave pie symbol so I will write pie as "#"

Radius=r

Circumference= 2#r

half circumference= 2#r/2=#r

Total Displacement(S)= (2×2#r)+(#r)

= 4#r + #r

= 5#r m

Displacement(|S|)= diameter = 2r m