Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
I just got into a discussio with a collegue on the interpretation of
the work-energy theorem, and we had quite different views on this basic
topic. Is it W(net) = Delta(E), or W(net) = Delta(KE)?
Consider a system consisting of a single mass being lifted:
View 1) You do work, so energy of the system increases. This shows up
as potential energy.
View 2) You do work, but gravity does equal negative work. The total
work done is zero, so KE stays the same.
...