Not if you add the stress of feet 1, feet 2 and feet 3. Then it is the same. Of course the stress on a person with three times the mass is greater, just as it would be if acrobat 1 weighed three times what the others weighed. But it wouldn't make any difference if they all weighed the same, but were taller in one instance than another. Three six feet acrobats on top of each other don't exert more stress than three five feet acrobats, assuming they all weigh the same.
Actually I suspect what we're really talking about is force per square inch, not total force which is what the earlier poster stated, I believe. Assuming equal force (m x a), and a smaller area then force/sq. in would be greater.
Last edited by cpa; 04/14/16 09:16 PM.
