The angular acceleration of a particle moving along a circular path with uniform speed is

CONCEPT:

• Circular Motion: Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path.
  •  The force acts continuously at right angles to the velocity of the particle.
• Uniform circular motion: The circular motion in which the speed of the particle remains constant is called uniform circular motion. In a uniform circular motion, force supplies the centripetal acceleration.

• In a uniform circular motion, a body is experiencing a force in the inward direction.

• Angular acceleration is the rate of change of angular velocity

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Where Δω = Change in angular velocity, Δt = Change in time

EXPLANATION :

• During uniform motion, the change in angular velocity is zero i.e.,

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• Then the equation of angular acceleration becomes

• Hence, option 2 is the answer