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**1.**The semester just started and my teacher has assigned us this question: How high of a tower could you build from the people in this class(30 people)? Include diagram. How much force would be pushing down on one of the base person's legs?

**2.**Note : Fg = mg

**3.**Here is my work so far : https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-xpf1/v/t34.0-12/10984948_953927737958691_1170451875_n.jpg?oh=40f03498ad9ae1badc744227031f4e0b&oe=54DCD7BB&__gda__=1423753387_e3fafa257d6be865db2e4a070b88de0e

I created a triangular shape(human pyramid) with 7 people on bottom then 6,5,4,3,2,1,1,1 <- the 1's are on each other shoulders. So far I have calculated the approximate height if the bottom 6 rows are on their hands and knees and if the top 3 are standing up.

The next part is what I need help with. How would I start calculating the force pushing down? I assumed the 2nd row pushing down on the guy at the base would be 2 halves (weight distributed evenly) and so on. I also assumed the height and weight would decrease as the tower went up. I know the force of gravity is 9.8 but how would I use that and Fg = mg in this situation?

I hope you can understand this and help me as I am really confused right now D: