A people-moving conveyor-belt moves a 600-newton person a distance of 100 meters through the airport.
a. How much work was done?
b. The same 600-newton person lifts his 100-newton carry-on bag upward a distance of 1 meter. They
travel another 10 meters by riding on the “people mover.” How much work was done in this situation?
In a), no work is done to move horizontally 'across" gravity. In b), he does (m) (g) (h) = (100)(9.8)(1) = 980 joules of work to lift the bag, and then no more work is done by the belt to move both of them horizontally.
