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Dadface said:Another problem I have is to do with the shortage of experimental evidence on macroscopic objects. So I respect what people are saying but until I can see some more evidence I shall remain a bit sceptical and keep an open mind about it. If I had to write something on SR i would probably try to keep any reference to mass to a minimum and put the emphasis on energy instead.
Not even the most ardent supporter of relativistic mass believes that more physical mass is present in one frame than another. It has never been more than a convenient (or inconvenient) notational device to simplify energy and momentum equations and make them more like their classical counterparts.
If you think relativistic mass could be the subject of active research to determine whether a) an object obeys ##\vec{F} = m_R\vec{a}##
and/or
b) ##F_g = \frac{GM_Rm_R}{r^2}##Then, you are sadly mistaken, and have developed a fundamental misunderstanding of SR and the nature of matter.
As I said in a previous post, the concept of relativistic mass has led you astray.