error in bike rack force calculation?
I was looking at an excellent web page in how to make your own wall-mounted bike rack ( link here ). But one aspect of it was bugging me... the calculation of the force acting on the hook in the wall. I encourage you to look at that site -- it's a bit annoying in that it requires you to click through 5-separate ad-laden pages to see it all, but I suppose that pays the bills. Here's my diagram of how the rack would look on my wall... either in the recommended arrangement of hanging the bikes wheel up, or in a way a bike shop friend of mine recommended, wheel down. Either or a mix would be compatible with the 2-tier arrangement of hooks. With only a single tier, you'd need to alternate up-down. Here's a separate example of such a rack with bikes hanging from the front wheel: Going back to the original web page where the bikes are also hung from the front wheel, the part I'm most interested in here is on page 3, which described the physics. Here's the ...