Question

If the diameter of a circle is 2m, If a person is completed 2 rounds, the displacement will be​

Answer 1

Answer:

Displacement = 0

Distance travelled = 6.28m

Explanation:

Displacement is 0 because the place from where a person starts moving stops at that place only , after completing 2 rounds.

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Answer 2

Answer:

Displacement is the shortest distance between the starting point and end point. If this person completed 2 rounds, that means, at the end, he came to the initial position again. That means the starting point and the end point are the same. So, there's no distance between the 2 points. Therefor the displacement is 0.

Explanation:

If you want the distance;

radius = diameter / 2  =  2m / 2 = 1m

circumference of the circle = 2π r

                                             = 2 x 22/7 x 1

                                             =6.28 m

Distance travelled in 1 round = 6.28 m

Distance travelled in 2 rounds = 6.28 x 2

                                                  = 12.56 m