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KVPY2016PhysicsRotational Motion

A particle at a distance of 1 ~m from the origin starts moving such that dr / d = r , where ( r , ) are polar coordinates. Then the angle between resultant velocity and tangential velocity component is

Options

  1. A30 degrees
  2. B45 degrees
  3. C60 degrees
  4. DDependent on where the particle is

Correct answer

B. 45 degrees

Step-by-step solution

AB = Direction of resultant velocity AD = Direction of tangential velocity array c = dr rd = r r =1 =45^ array

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