A student of mass climbs straight up a staircase that is high in

PHYSICS · Multi-part · CBSE · Physics · Work and Energy · Work and Energy

Problem

A student of mass 50 kg50\,\text{kg} climbs straight up a staircase that is 5 m5\,\text{m} high in 4 s4\,\text{s}. (Take g=10 m s−2g = 10\,\text{m\,s}^{-2}.) (i) Calculate the work done by the student against gravity. (ii) Determine the average power developed. (iii) Express this power in horsepower, given 1 hp=746 W1\,\text{hp} = 746\,\text{W}.

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