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GK QUESTION#3011

Which of the following is NOT an example of inertia at rest?

  1. AFalling down backward when a vehicle starts immediately
  2. BFalling down of dust particle while dusting a cloth
  3. CThe detachment of leaves/fruits due to shaking
  4. DA passenger lurching forward when a moving vehicle brakes suddenlyCorrect answer
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Answer

D. A passenger lurching forward when a moving vehicle brakes suddenly

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Explanation

When a moving vehicle brakes suddenly, a passenger tends to retain the previous forward velocity. This illustrates inertia of motion, not inertia of rest. The other examples concern material tending to stay at rest while its support is moved.

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