Question

Calculate the power expanded by a man of mass 72kg who climbs a hill of height 5m in 40sec. g=10ms-2

Answer 1

$power = \frac{workdone}{timetaken} \\ \\ = \frac{f \times a \times d}{t} \\ \\ = \frac{72 \times 10 \times 5}{40} \\ = 90$