A body is moving in a circular path with acceleration a. If its velocity gets half then find the ratio of acceleration after and before the change of velocity?

  1. 1 : 4
  2. 1 : 2
  3. 2 : 1
  4. 4 : 1

Answer (Detailed Solution Below)

Option 1 : 1 : 4
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Detailed Solution

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CONCEPT:

  • Centripetal Acceleration (a): Acceleration acting on the object undergoing uniform circular motion is called centripetal acceleration.
  • It always acts on the object along the radius towards the center of the circular path.
  • The magnitude of centripetal acceleration,

Where v = velocity of the object and r = radius

EXPLANATION:

  • When an object moves in a circular path with constant speed, then its acceleration is given as

         --------------- (1)

  • When speed is half then acceleration is given as

     ---------- (2)

  • Now the ratio of final and initial acceleration will be

So, the ratio of acceleration will be

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