1. The problem statement, all variables and given/known data You are standing on the ﬂoor of an elevator that starts, at rest, at the ﬁrst ﬂoor of a building and then moves at constant speed to the tenth ﬂoor where it stops. Then you reverse the motion, ending where you started at the ﬁrst ﬂoor. Describe the two important forces that act on you during this motion. 2. Relevant equations 3. The attempt at a solution One of the Forces would be gravity right? What is the other one?