- #1

lott

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Hi. I am hoping that someone can explain, in the language of physics, the solution to a problem encountered during a real-world product design. I have already solved the problem. I am simply looking for why the solution worked in terms of the language of physics.

Please see the attached PDF to view the assembled product.

I have a product that has 3 components -- (1) a bracket that is vertically affixed to a wall such that it is perfectly level (2) a 3/8 diameter solid steel rod that is bent at each end with the end that is inserted into the bracket bent downward at a 93 degree angle and the opposite end bent upwards at a 90 degree angle and (3) a container that is placed atop the up-turned end of the arm that weighs approx. 8 pounds (when it is filled). The rod can simply be lifted out of the wall bracket and the container can simply be lifted off of the up-turned end of the arm (i.e. there are no additional parts or mechanisms securing either the rod or container).

Previously, the down-turned end of the rod (which fits into the bracket) was bent at a 90 degree angle, but we had to hyper-extend that angle to 93 degrees in order to keep the rod level (parallel to the floor) when the 8 pound container was placed atop it. In other words, when both bends were 90 degrees, the weight of the container caused the rod to slope downward.

Can someone explain in terms of physics (additional vertical force needed to counter-balance the container, etc.) why this is the case. Can someone actually give me an equation that shows why 93 degrees seemed to work? Or can you show me that it really should have been 92 or 94 degrees, etc.?

As a math geek (but in statistics instead of physics), I sincerely want to understand the physics behind this. I am sure this is elementary for all of you, but I truly appreciate it. If additional measurements of any of the components are needed, I can provide them.

Please see the attached PDF to view the assembled product.

I have a product that has 3 components -- (1) a bracket that is vertically affixed to a wall such that it is perfectly level (2) a 3/8 diameter solid steel rod that is bent at each end with the end that is inserted into the bracket bent downward at a 93 degree angle and the opposite end bent upwards at a 90 degree angle and (3) a container that is placed atop the up-turned end of the arm that weighs approx. 8 pounds (when it is filled). The rod can simply be lifted out of the wall bracket and the container can simply be lifted off of the up-turned end of the arm (i.e. there are no additional parts or mechanisms securing either the rod or container).

Previously, the down-turned end of the rod (which fits into the bracket) was bent at a 90 degree angle, but we had to hyper-extend that angle to 93 degrees in order to keep the rod level (parallel to the floor) when the 8 pound container was placed atop it. In other words, when both bends were 90 degrees, the weight of the container caused the rod to slope downward.

Can someone explain in terms of physics (additional vertical force needed to counter-balance the container, etc.) why this is the case. Can someone actually give me an equation that shows why 93 degrees seemed to work? Or can you show me that it really should have been 92 or 94 degrees, etc.?

As a math geek (but in statistics instead of physics), I sincerely want to understand the physics behind this. I am sure this is elementary for all of you, but I truly appreciate it. If additional measurements of any of the components are needed, I can provide them.