Question

what is terminal velocity...????

Answer 1

it is the max. constant velocity acquired by a freely-falling body in a viscous medium....
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Answer 2

◆As the body falls through a medium, its velocity goes on increasing due to gravity. Therefore, the opposing viscous drag which acts upwards also goes on increasing. A stage reaches when the true weight of the body is just equal to the sum of the upward thrust due to buoyancy and the upward viscous drag. At this stage, there is no net force to accelerate the body. Hence it starts falling with a constant velocity, which is called terminal velocity.

◆It is the maximum constant velocity acquired by the body while falling freely in a viscous medium.