An object of mass falls from rest through a vertical distance of and attains a velocity of

PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

An object of mass 5 kg5\text{ kg} falls from rest through a vertical distance of 20 m20\text{ m} and attains a velocity of 10 m s−110\text{ m s}^{-1}. How much work is done by air resistance on the object? Take g=10 m s−2g=10\text{ m s}^{-2}.

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