Recent content by selftaught

Quite honestly, I don't know where to go from there. I can quote numerous texts which describe energy in exactly these terms. McGinnis, Biomechanics of Sport and Exercise, 'in mechanics,energy is defined as the capacity to do work' (p105). The same in Hall, Basic Biomechanics, p 408. Carr, Sport...

Not a lot of room to misunderstand. One of the fundamental breakthroughs of injury science was James Gibsons identification of energy as being the 'agent of injury' in 1961. William Haddon can to the same conclusion independently 3 months later and clarified some confusion surrounding Gibson's...

Specific questions. 1. 'The Earth has the capacity to do work'. Energy is defined as the capacity to do work. What form of energy does the Earth have which then has the capacity to do work? 2. I understand the idea that the reaction force applied by the Earth causes displacement in terms...

THanks. Giving it a try. Found I also had to copy the quote to the front of subsequent paragraphs. You'd be arguing against an entire scientific discipline. They refer to five forms of energy: mechanical, chemical, electrical, radiant, and thermal. There is also the absence of vital elements...

thanks

OK. Thanks. I see it can be explained two different ways which I cannot reconcile. 1. When work is described as the means by which energy is transferred from one object or system to another. And W=Fd. The bowl accumulates KE during its fall. The ground possesses no mechanical energy...

For me pressing muti quote then quote, or pressing quote, are producing the same result. One long quote of the entire post rather than each paragraphe being a quote which i can then comment on. I'm obviously doing something wrong. Any suggestions?

Again the multiquote didn't work. Too true, Mapes. You did refer to 'new surface area' in post 34. The first to suggest more than sound and noise energy. However, as explained in a previous post today, I'm not from your tribe and that phrase would not suggest a form of energy to anyone outside...

DaleSpam. Tried your advice but only got this one long quote. Ok for this reply but not for others. My previous post today explains why I am restricting my domain. I'm trying to apply mechanical principles to explain a particular activity. That restriction is based on the definition of injury as...

OK. For one and all. Before things get out of hand, I need to explain where I'm coming from. Firstly, I truly appreciate your attempts at helping me. Secondly, as my name suggests, I am in the process of teaching myself certain mechanical/physics principles. I am doing so for a very specific...

Thanks DaleSpam. Will follow your instructions now. I must confess I did attempt that but was concerned that clicking quote would include my comments in with the actual quote ... as I did in reply to one poor sod's post when he was attempting to help me.

I want to respond to the new posts but 'mulit quote' does not appear to be functioning for me for some reason. I'm new to using this (any) forum. Can someone help please?

That has never been in question. To make it clear - I am interested in explaining the injury or damage that results when a person lands from a fall onto a hard surface. And that explanation has to be in terms of energy. GPE is converted to KE which is then converted to what form of energy...

OK. A completely different response received from Ben Crowell (physics professor). 'In the example of the fracture, the energy is going into electrical potential energy to separate, e.g., one calcium atom from another.' Just when I'm coming to grips with the conversion of KE to sound and...

And more concepts which do not reconcile with basic idea. Energy can only change form from one form of energy to another form of energy. What form of energy is 'additional surface area' or 'defects (dislocations)'? I'm not being smart but I'm simply sticking to one idea and following it through...