A spherical raindrop 2.7 mm in diameter falls through avertical distance of 5000 m. Take the cross-sectional area of araindrop = πr2, drag coefficient =0.45, density of water to be 1000 kg/m3,and density ofair to be 1.2 kg/m3.
(a) Calculate the speed a spherical raindrop wouldachieve falling from 5000 m in the absence of air drag.
313.04 m/s (correct)
(b) What would its speed be at the end of 5000 m when there is airdrag? (Note that the raindrop will reach terminal velocity afterfalling about 30 m.)
 Â
_______ m/s
