00:01
Energy and power are related such that power is the rate of energy transfer.
00:05
In this problem, we're given with a person which mass is 57 .5 kilograms, is going to carry himself all the way up to the sixth floor of the building with 137 steps.
00:18
Each step has a height of 16 .1 centimeters.
00:23
It is known that he can do this in a matter of 6 .6 minutes and 51 seconds.
00:28
We want to find for letter a the work that he needs to do in order to carry himself all the way up to the sixth floor of the building.
00:36
Letter b, the average power of the person during the said a lift.
00:42
And for letter c, the number of food calories the person would be burning during the said activity.
00:48
Noting that one cal, that's capital c there, equals 4 .186, 8 kilojoules.
00:55
So we'll use that later as our conversion factor...