Question

A runner completes one round of circular path of radius r in 40 seconds . His displacement after 2 minutes 20 seconds will be -​

Answer 1

Answer:

sorry Don't know the answer of this question

Answer 2

Answer:   2r

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

Given that,

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.

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