I have the following problem:
A man that weights 50kg goes up running the stairs of a tower in Chicago that is 443m tall. What is the power measured in watts if he arrives at the top of the tower in 15min?
So far I used this equation:
W = ΔEc + ΔEp + ΔEq
Where ΔEc is the variation of the kinetic energy, ΔEp is the variation of the potential energy (based on the height) and ΔEq is the energy based on friction.
There isn't an initial W and a ΔEq, so I have this equation:
ΔEc = - ΔEq
Am I doing something wrong? I am stuck here.