Question

a girl is running over a circular path of radius 42 metre calculate the displacement if she covers 1) one round 2) twenty rounds 3) five rounds 4) two rounds​

Answer 1

Answer:

1) 0     2) 0    3) 0     4) 0

Explanation:

Since, displacements is the shortest distance between initial position and final position.

therefore, when she covers one complete round then she will be at the same place from where she started.So, distance between finial and initial position will be 0.

Similarly for 20,5 and 2 rounds her displacement will be 0.

Answer 2

Answer:

it is 0 because,

displacement: shortest path between initial and final position

when she completes a round it means she reached the position on a circle where she has started

so there is no displacement.