An airplane passenger carries a 260 N suitcase up the stairs, a displacement of 3.80 m vertically, and 4.30 m horizontally.
(a) How much work does the passenger do?
(b) The same passenger carries the same suitcase back down the same stairs. How much work does the passenger do now?
this time,gravity does work on suitcase,so it is negative.
So how am I supposed to use the heights given from the problem? Subtract 4.30 m from 3.80 m?