Question

a runner completes one round of a circular path on 20 seconds the radius of track is 7 m find the displacement of the runner after completing 2 rounds
plz tell me as soon as possible tommorww is my exam. ​

Answer 1

Answer:

His displacement after 2 minutes 20 seconds will be 2 r.

Step-by-step explanation:

Radius of the circle = r

We need to calculate the displacement,

A runner completes one round of a circular path of radius r in 40 second.

A runner completes 3.5 round in 140 second.

So, the displacement will be zero in 3 round.

In 0.5 round, the runner covers the distance is 2 r.

Therefore, The displacement will be

Displacement = final position - initial position

Hence, His displacement after 2 minutes 20 seconds will be 2 r.