Question

Find the displacement of a sportswoman after 60 sec if she completes one round of a circular track of radius 5m in 30sec?

Answer 1

0 right because she ends at the starting point.

Answer 2

 This question has simple logic. If the sports women is covering a distance=2×3.14×5=31.4: but it is distance but displacement will be zero for first round.(if we take mean position and subtract by final position we will get zero ). Then for two rounds will be2×0=0 . First imagine a circular track and will help solving this question.