- #1
Dalip Saini
- 16
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Homework Statement
cube has a drag coefficient of 0.90. What would the terminal velocity of this cube be, 1.0 cm on a side in air (ρ = 1.2 kg/m3)? Take the density of this cube to be 1.6 x 103 kg/m3.
A
68 m/s
B
1.6 m/s
C
5.6 m/s
D
20 m/s
E
360 m/s
Homework Equations
terminal speed = sqrt[(2mg)/(Cpa)]
volume*density = mass
The Attempt at a Solution
(0.01 m)^3(1.6E3 kg/m^3) = 1.6E-3 kg
terminal speed = sqrt [((2(1.6E-3)(9.8))/((0.9)(1.2)(0.01)^2)] = 17.04 m/s but the answer is 1.6 m/s. I don't understand what I did wrong.