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)

A vertical air stream flowing at a velocity of 100 m/s supports a ball

1.	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)
A.	20.2 N
B.	13.5 N
C.	30.1 N
D.	25.2 N
Answer» C. 30.1 N

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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)

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