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KCET2024PhysicsMotion in One Dimension

An athlete runs along a circular track of diameter 80 m . The distance travelled and the magnitude of displacement of the athlete when he covers 3 / 4 th of the circle is (in m)

Options

  1. A60 , 40 2
  2. B40 , 60 2
  3. C120 , 80 2
  4. D80 , 120 2

Correct answer

A. 60 , 40 2

Step-by-step solution

Given, diameter, d=80 ~m r=40 ~m Distance travelled after completion of 3 4 revolution = 3 4 2 r= 3 2 40=60 ~m Displacement = r^2+r^2 =r 2 =40 2 ~m

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