Question

A rain drop of radius 0.1 mm falls in atmosphere with terminal velocity v.If such 8 droplets combine to form single drop,find its terminal velocity.​

Answer 1

Answer:

Here, r=0.3mm=0.03cm,

v=1ms

−1

=100cms

−1

,

η=18×10

−5

poise.

According to stokes law, force of viscosity on rain drop is

F=6πηrv

=6×3.142×18×10

−5

×0.03×100 dyne

=1.018×10

−3

dyne

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