rain drops falling unde gravity do not acquire very high velocity . why?
Answers
This happens due to terminal velocity.
When a rain drop falls under gravity through a viscous medium (say air) a viscous drag acts on it in a direction opposite to that of motion. According to stoke's law, this viscous drag goes on increasing with the increasing velocity of the drop till a stage comes when the total downward force on the drop is just balanced by the upward viscous drag. At this stage, there is no net force to accelerate rain drop. Hence the rain drop starts moving with uniform velocity. This velocity is called 'terminal velocity'.
Answer:
Explanation:When a rain drop falls under gravity throght a viscous medium (say air) a viscous drag acts on it in a direction opposite to that of motion. ... At this stage, there is no net force to ac celerate rain drop. Hence the rain drop starts moving with uniform velocity . This velocity is called `terminal velocity'.