本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学
[单选题]
A spherical raindrop falls at a 7 -b.fbj+ziz 5lqrva 5terminal speed of;3fbp ;swjo/ c v. Its density is ρ and its radius is r Which of the following expressions is correct for v? (Buoyancy acting on the raindrop is insignificant)
A. v=$\frac{2g\rho\gamma^2}{9\eta}$
B. v=$\frac{2g\rho\gamma}{3\eta}$
C. v=$\frac{24\pi^2g\eta\rho\gamma^4}{3}$
D. v=$\frac{2g\rho\gamma^2}{9\eta}$
参考答案: A
本题详细解析:
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