A50 kg person is at the shopping mall. he rides an elevator up 5 m, walks 40 m to an escalator, and rides the escalator back to the ground floor traveling 5 m vertically and 5 m horizontally.
a.) what work is done by the normal force in the elevator? by gravity?
b.) what is the total work done in the elevator?
c.) what work is done by the normal force along the concourse? by gravity?
d.) what is the total work done along the concourse?
e.) what work is done by the normal force on the escalator? by gravity? f.) what is the total work done on the escalator?