Questions
A rain drop starts falling from a height of 2 km. It falls with a continuously decreasing acceleration and attains its terminal velocity at a height of 1 km. The ratio of the work done by the gravitational force in the first half and the second half of the drops journey is:
detailed solution
Correct option is A
Taking g constant, work done in both the cases is -mg×(1000) since the maximum velocity of the journey is attained at a height of 1 km, and the second half journey is travelled by max. velocity, the time taken for second half journey will be less.Talk to our academic expert!
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The terminal velocity of a small sized spherical body of radius r falling vertically in a viscous liquid is given by the following proportionality :
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