Question

An object is moving in a circle of radius r. Calculate the distance and displacement when it completes half the circle, when it completes one full circle.​

Answer 1

Explanation:

distance when it completes half the circle = 1/2 × perimeter of the circle

= 1/2 × 2 π r

= π r

displacement when it completes half the circle = diameter of the circle

= 2 r

distance when it completes one full circle = perimeter of the circle

= 2 π r

displacement when it completes one full circle = 0 (because the initial point and the final pont are same)