A Cricket Ball Is Resting on a Picnic Table

question 6

Multiple Choice

A cricket ball is resting on a picnic table. There is a gentle wind moving at 1m s-1. Assuming that Stokes' law applies, how much force does the wind apply to the ball? The radius of a cricket ball is 3.6 cm and the viscosity of air is 1.8x10-5 Pa s.

• A) 1.2x10-5 N
• B) 2.4x10-4 N
• C) 1.2x10-3 N
• D) 2.4x10-2 N
• E) 1.2x10-1 N
• ANS

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