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- Summary:
- Well, not really an umbrella stand, but same principle!

I'm working on a project where I have an upright post secured to a flat square base (similar to an umbrella stand). I want to know how much force would be required to start it to tip toward its left edge. Here's an illustration where the base is 10" square, 1" thick and weighs 50 lbs. There is an upright pole of insignificant weight anchored to the base assuming the right edge is centered exactly 5" from the edge of the base.

I want to know the formula to calculate how much force would be needed to move (lift) the base if it's applied from various elevations along the upright pole (for example 30" above the base).

I want to know the formula to calculate how much force would be needed to move (lift) the base if it's applied from various elevations along the upright pole (for example 30" above the base).

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