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Which one of the following represents the correct dimensions of the coefficient of viscosity?

1. [ML⁻¹T⁻¹]
2. [MLT⁻¹]
3. [ML⁻¹T⁻²]
4. [ML⁻²T⁻²]

Correct answer: [ML⁻¹T⁻¹]

Solution

The coefficient of viscosity measures the internal friction of a fluid, which relates shear stress to shear rate. Its dimensions are derived from the formula for viscosity, resulting in mass per unit length per unit time, represented as [ML⁻¹T⁻¹].

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