Two people who weigh the same climb a flight of stairs. the first person climbs the stairs in 30 s, while the second climbs in 40 s. Which person does more work? Which person uses more power?

 

Answer

Both do the same amount of work. The power which rate of doing work is different: The one who does this work in 30 second has more power .P = W/t [W/ 30] > [W/40]