Stress can be read backward as the force required for a chosen area. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Stress and area can be inverted to recover force
Start from target stress 6 Pa and checked area 2 square meters then multiply them to recover the force 12 N. The diagram must show that same force-area-stress triple.
F=σA=6Pa×2m2=12N
Stress and area can be inverted to recover force
Start from target stress 5 Pa and checked area 4 square meters then multiply them to recover the force 20 N. The diagram must show that same force-area-stress triple.
F=σA=5Pa×4m2=20N
Stress and area can be inverted to recover force
Start from target stress 8 Pa and checked area 5 square meters then multiply them to recover the force 40 N. The diagram must show that same force-area-stress triple.