Hi, I am a newby to all of this, can't find any good answers on the internet, hope someone with experience can help! If I have a solid steel pole with a length of 50 cm, hang this from a roof, and want to hang a 7 kg object from this pole, how thick does the pole have to be? If I reduce the weight of the hanging object, how will this effect the thickness of the pole required? If I make the pole longer, can it handle less, the same or more weight? If I use a hollow steel pipe, how thick does the pipe have to be? If you do supply a calculation, could you supply this with an explanation of the different symbols of the formula instead of just the formula, as I am really new and would not understand? To use an example, someone told me to calculate the induced EMF is E=2 x length of wire down x radius to wire x Radial Flux Density B from magnets x rotational speed. Thanks!