Question

A small ball (menu) falling under graivty in a viscous medium
experiences a drag force proportional to the instantaneous
speed u such that Fdrag = Ku . Then the terminal speed of
the ball within the viscous medium is
(a)K/mg
(b)mg/K
(c)√mg/K
(d)(mg/K)²

Answer 1

Answer:

For terminal velocity , weight should be balanced by upward force.

Here we have excluded buoyancy force.

Now, Ku=mg

u=mg/k

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