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A circular motion can be defined using

A circular motion can be defined using Correct Answer angular displacement

The correct answer is option 2) i.e. angular displacement

CONCEPT:

  • Circular motion: The motion of an object along a circular path is called circular motion.
    • A circle is assumed to be a polygon with infinitely many sides such that each side approximates to a point.
    • So, an object moving on a circular path undergoes a change in direction at every point.
    • Since direction changes at every point, velocity changes at every point.

​EXPLANATION:

  • For an object under circular motion, it covers angular distances (not linear distances) with respect to the centre of the circle.
  • The angle covered by the object for any time is called the angular displacement for that time.
  • It is expressed in radians.

Confusion Points

  • Time alone cannot be used to describe circular motion. There is no 'angular time' in case of circular motion.
  • Speed can only determine how fast or slow an object is moving in a given path. It cannot describe the displacement of a particle. 
  • Force is the push or pull acting on an object in general. It will not define circular motion.

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