An electrically powered stage mechanism pulls a scenery panel through 8.0 m. It exerts a constant force of 75 N in the direction of movement and receives 1.0 kJ of energy.
A Sankey diagram is planned with a 50 mm input arrow and two output branches. One output represents the work done on the panel and the other represents energy transferred to thermal stores.
What width should be used for the branch representing the energy transferred to thermal stores?
40 mm40\ \mathrm{mm}40 mm
8.0 mm8.0\ \mathrm{mm}8.0 mm
30 mm30\ \mathrm{mm}30 mm
20 mm20\ \mathrm{mm}20 mm