A small steel ball is droppee from a height of 2.5min a tall glycerin jar.It hit the surfacr of glycerin with certain velocity and sinks to the bottom by
losing 20% of its velocity at the surface. If the time
taken to reach the bottom after it is dropped is 2 s
and velocity in glycerin is lost at constant rate, then
find the average velocity of the ball over the whole
journey
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