Q236
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
AnswerB.
6.70 N
C.
1.67 N
D.
0.52 N
Answer: Option A
Solution
Answer: Option A
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