A vertical air stream flowing at a velocity of 100 m/s supports a ball of 60 mm in diameter. Taking the density of air as 1.2 kg/m3 and kinematic viscosity as 1.6 stokes, the weight of the ball that is supported is (if coefficient of drag CD = 0.8)
1
20.2 N
2
13.5 N
3
30.1 N
4
25.2 N