Two spheres falling through water..terminal velocity?

AI Thread Summary
A glass sphere with a diameter of 1.75 cm and a density of 2.5 g/cm³ has a terminal velocity of 0.3 m/s while falling through water. A wooden sphere of the same size but with a lower density of 0.85 g/cm³ is released from the bottom of the tank. The discussion focuses on determining the terminal velocity of the wooden sphere as it rises. After some initial confusion, it is clarified that the terminal velocity of the wooden sphere is 3 cm/s in the upward direction. The conversation emphasizes the need for understanding the principles of buoyancy and drag forces in fluid dynamics.
imatreyu
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Homework Statement



A glass sphere of diameter 1.75 cm and density 2.5 g/cm^3 falls through water with a terminal velocity of 0.3m/s. A wooden sphere of the same diameter and density 0.85 g/cm^3 is released from the bottom of a tank of water. Determine the terminal velocity with which the wooden sphere rises.

Homework Equations


I have no idea where to start! Could someone point me in the right direction?


The Attempt at a Solution



I converted everything so that all units are in kg or m . . .

But now I have no idea what equation to use, etc. . . Just a hint. . would be nice.

Thank you, in advance!
 
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answer is 3cm/s upward direction
 

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Oh. . .Wow, thank you.
 

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