Question

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Four objects are being tested to see how they are affected by fluid friction. Object W has a surface area of 4.5 cm2, Object X has a surface area of 2.5 cm2, Object Y has a surface area of 6.2 cm2, and Object Z has a surface area of 3 cm2.

Which object would experience the most fluid friction?

W

X

Y

Z

Answer 1

The expression for viscous force goes like :
F = k × A× velocity gradient. Where F is force and k the proportionality constant. Thus the object with higher surface area will experience greater force.