Well, what about when all three stand on the floor, as in Case 1? Each acrobat is carrying 150 pounds on his feet. No acrobat has 450 pounds his feet. But the gym floor carries 450 pounds of acrobat. Stack them up and the gym floor still carries 450 pounds of acrobat. The gym floor provides 450 pounds of force in the opposite direction of the weight of the three acrobats both in Case 1 and Case 2. But only in Case 2 are an acrobat's feet subjected to 450 pounds.


Last edited by AmarilloMike; 04/14/16 09:37 PM.

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