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Concepts Of Physics MCQ Edition [Volume 1]PhysicsCircular Motion

When viewed from an inertial frame of reference, a particle of mass m is seen travelling in a circle of radius r at a uniform speed v . What is the centrifugal force acting on the particle?

Options

  1. Azero
  2. Bmv^2 r directed away from the centre
  3. Cmv^2 r along the tangent passing through the particle
  4. Dmv^2 r directed towards the centre

Correct answer

A. zero

Step-by-step solution

Centrifugal force is a pseudo force which is experienced only in a non-inertial (rotating) frame of reference. When viewed from an inertial frame of reference, no pseudo forces are present. The particle executes circular motion solely due to a real centripetal force of magnitude mv^2 r directed towards the centre. Thus, the centrifugal force acting on the particle in an inertial frame is zero.

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