Udith posted an Question
June 02, 2020 • 01:36 am 30 points
  • IIT JAM
  • Physics (PH)

Doubt on motion

Why a plastic bottle is moved by wind but its cap can't?

1 Answer(s) Answer Now
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  • comment-profile-img>
    Ruby negi best-answer

    yeah ,here the mass of bottle is light and also area is large so more force acts on it. but if you fill the bottle with water, sand then it will not move, while in case of cap,the area of cap is small so less force acts on it...

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    explaination

  • comment-profile-img>
    Abhishek singh

    it's all about Aerodynamics, in simpel language, size, shape and mass of bottle and cap are different. if you increase the mass of bottle let say by filling sand in it, then the case would not remain same. or if you decrease the mass of cap to very low value then also the case would change.

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    simple*

  • comment-profile-img>
    Ruby negi

    either bottle is moving alone or with cap?

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    bottle alone is moving

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    cap is still at some place

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    according to me, because of large area, force on bottle is large that's why it is moving (force=pressure*area)...

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