Chapter 5. Drag force for small objects at low speeds (5-8)

Question

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{"title":"Magnitude of the drag force on a small object moving at low speed","description":"Correct!","type":"correct","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"1,5,35,51\"}]"} {"title":"Constant that depends on the properties of the object and of the fluid","description":"Wrong","type":"incorrect","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"118,11,119,13\"},{\"shape\":\"rect\",\"coords\":\"178,6,206,53\"}]"} {"title":"Speed of the object relative to the fluid","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"210,21,239,59\"}]"}

Question

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{"title":"Magnitude of the drag force on a small object moving at low speed","description":"Incorrect","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"1,5,35,51\"}]"} {"title":"Constant that depends on the properties of the object and of the fluid","description":"Correct!","type":"correct","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"118,11,119,13\"},{\"shape\":\"rect\",\"coords\":\"178,6,206,53\"}]"} {"title":"Speed of the object relative to the fluid","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"210,21,239,59\"}]"}

Question

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{"title":"Magnitude of the drag force on a small object moving at low speed","description":"Incorrect","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"1,5,35,51\"}]"} {"title":"Constant that depends on the properties of the object and of the fluid","description":"Wrong","type":"incorrect","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"118,11,119,13\"},{\"shape\":\"rect\",\"coords\":\"178,6,206,53\"}]"} {"title":"Speed of the object relative to the fluid","description":"Correct!","type":"correct","color":"#333300","code":"[{\"shape\":\"rect\",\"coords\":\"210,21,239,59\"}]"}

Review

For an object that is very small and is moving very slowly, such as a living cell or virus, the magnitude of the drag force is directly proportional to the speed \(v\):