A 80 kg firefighter climbs flight of stairs 6 meter high in 10 seconds.

How much work is required by the firefighter?

2 answers

Work = F*d = Mg*d = 80*9.8 * 6 = 4704 J
A dog does 12'500 I of work when he pulls a wagon that weighs 250 N. How far did the dog pull the wagon