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what is non periodic motion?

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Yes you are all correct.

Any motion whose characteristics don't repeat at regular intervals.

-- Fly in a bottle.

-- Clouds moving across the sky.

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Any motion whose characteristics don't repeat at regular intervals.

-- The motion of a car driving several blocks on a busy downtown street.

-- The motion of my dog on a walk around the block.

-- The motion of fingers as they type on a keyboard.

-- The motion of fingers as they play a song on a keyboard.

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Non periodic motion is a repetitive motion which repeats itself but not at fixed intervals of time.Eg-

  • A fly in a bottle.
  •  Leaves blowing along a roadside. 
  • Clouds moving across the sky. 
  • Your eyes watching a football match.
  • Atoms & molecules in liquids and gases. 
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A MOTION IS SAID TO BE IN NON PERIODIC MOTION IF IT EITHER DOES NOT NOT REPEAT ITSELF OR DOES THE REPEATATIONS IN A RANDOM IRREGULAR MANNER.

FOR EXAMPLE, WHEN WE SPEAK OUR LIPS UNDERGO MOVEMENT. THEIR MOVEMENT CONTINUES AS LONG AS WE SPEAK. HOWEVER THE MOVEMENT OCCURS AGAIN WHEN WE SPEAK AGAIN. THUS THE MOVEMENT OF LIPS GET REPEATED BUT THERE IS NO REGULARITY OF OF TIME HERE. WE CALL SUCH A MOTION AS A NON PERIODIC MOTION.

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  • a fly in a bottle
  • leaves blowing along a roadside
  • clouds moving across the sky 
  • eyes watshing a football match 
  • atoms an molecules in liquids and gases
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Any motion whose characteristics don 't repeat at regular intervals.

TO UNDERSTAND IT BETTER,

A period is the time T it takes something to oscillate through one complete cycle. If that time T is the same each and every cycle that's called periodic motion. If the time T changes from cycle to cycle that's called non periodic motion.

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