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On which these factors does air/fluid resistance force, acting on a spherical body, not depend?
  • a)
    Radius of body
  • b)
    Velocity of body
  • c)
    Coefficient of viscosity
  • d)
    Density of body
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
On which these factors does air/fluid resistance force, acting on a sp...
Resistance force by a fluid on a body = 6πηrv, where η is coefficient of viscosity, r is radius of body & v is its velocity. This doesn’t depend on density.
Another way to think of this is to imagine a hollow and solid sphere of the same radius falling through air at the same speed. The resistance offered by air will be the same on both as they have the same surface area exposed and are moving at the same speed.
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On which these factors does air/fluid resistance force, acting on a spherical body, not depend?a)Radius of bodyb)Velocity of bodyc)Coefficient of viscosityd)Density of bodyCorrect answer is option 'D'. Can you explain this answer?
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