A -thick film of motor oil is observed to spread slowly over a horizontal glass plate

PHYSICS · Subjective · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

A 1 mm1\,\text{mm}-thick film of motor oil is observed to spread slowly over a horizontal glass plate. Would modeling the oil as an ideal fluid lead to an over-prediction or an under-prediction of the spreading rate? Briefly justify your answer in one or two sentences.

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