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4 answers

a spiral staircase,or a screw.

2006-12-10 14:49:02 · answer #1 · answered by vande-man 3 · 0 0

Problems involving screws can often times be solved by treating them like the inclined plane you describe.

2006-12-10 22:47:21 · answer #2 · answered by astatine 5 · 0 0

A screw is an example of this.

2006-12-10 22:46:48 · answer #3 · answered by Bugmän 4 · 0 0

a screw

2006-12-10 22:46:17 · answer #4 · answered by orion_1812@yahoo.com 6 · 0 0

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