A steel ball (density ρsteel = 7200 kg/m3) is placed in an upward moving liquid AI (density ρal = 2360 kg/m3, viscosity μAl = 1 × 10-3 Pa.s and Reynolds number = 5 × 105). The force (F) exerted on the steel ball is expressed as F = fπR2(ρAl V2/2)
where, f is friction factor (= 0.2), v is the velocity of liquid AI and R is the radius of steel ball.
The force exerted on the steel ball is
A. 8.32 N
B. 6.70 N
C. 1.67 N
D. 0.52 N
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Miscellaneous In Metallurgy
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