When a ball is released from rest in a very long column of viscous liquid?
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When a ball is released from rest in a very long column of viscous liquid, it has the following important characteristics .
Initially after release the velocity of ball will increase due to force of gravity.
When the velocity of ball is increasing then the Stroke's force (directly proportional to velocity).
The ball also experiences constant buoyant force.
A time comes when the force due to gravity, stroke's force and buoyant force become in equilibrium.
In that case,
the ball moves with a constant
(net force = 0 N) velocity.This velocity is called terminal velocity.
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