Questions
A small steel ball falls through a liquid at a constant speed of .If the steel ball is pulled upwards with a force equal to twice its effective weight, how fast will it move upward (in m)
detailed solution
Correct option is A
at terminal velocity viscous force upward = apparent weight down ward Fv=Apparent wt =Wif it is pulled with double the effective weight then upward force is 2w , downward force is w and viscous force will be downward direction w so that net force will be zero hence for same viscous force velocity will be also same but upwardTalk to our academic expert!
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From amongst the following curves, which one shows the variation of the velocity v with time t for a small sized spherical body falling vertically in a long column of a viscous liquid
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