Question

A boy is running around a circular path of 21 m he takes 2 minutes to complete one round find the distance, displacement, average velocity

Answer 1

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Here is answer

Is distance that part covered by the body between its initial and final position

The distance covered will be equal to the circumference of the circle

Distance=2πr=42π=131.8m

Displacement is the shortest distance travelled between the initial and final position

As the initial and final position of the body is the same

Net displacement is zero

Average velocity is the ratio of net displacement covered with respect to time

as NET displacement is zero average velocity of the object is also zero

average speed is the ratio of Total distance covered with respect to time

Time =2 min=2×60=120 sec

Avg speed

= Total distance /time

= 42π / 2 × 60

= 131.8/120

=1.09 m.