Terminal Velocity

[MDwannabe7]

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If Fdrag = bv^2 for a ball of mass 3 kg, and the terminal velocity of the ball is 30 m/s, what is b?


any ideas how to solve this?

 

[BerkReviewTeach]

If Fdrag = bv^2 for a ball of mass 3 kg, and the terminal velocity of the ball is 30 m/s, what is b?


any ideas how to solve this?

At terminal velocity, Fdrag = mg, so you need to rewrite the formula as:

mg = bv2

from there is should be simple math leading to 0.0333. (assuming mks units).