Question

Foster usually walks up three flights of stairs to his physics class without getting tired. However on Monday, he is late for class and decides to run up the three flights of stairs. Although he did not run for a long period of time and traveled the same distance as normal, Foster feels more tired at the top of the stairs than on the days he walks. Use the concept of power to explain why he feels more tired.

Answer 1

Dear Student,
Since power is related to the work done per unit time. If a work is done rapidly then power will be more. Foster runs faster on monday so the power needed is more. hence more energy will be used up and foster gets tired.
I hope this explains well !
Regards!