A Sphere of Radius 1 Cm Is Moving Through a Vat

question 25

Multiple Choice

A sphere of radius 1 cm is moving through a vat of corn syrup, which has a viscosity of 1.4 Pa s. A force of 0.01 N is needed to keep it moving at a constant speed. What is the speed? You may assume that Stokes' law applies.

• A) 3.8 cm s-1.
• B) 26 cm s-1.
• C) 23 cm s-1.
• D) 12 cm s-1.
• E) 6.8 cm s-1.ANS

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