Planck (1906a) akatsanangura chinonzi relativistic momentum uye akapa kukosha kwakarurama kwehuwandu hwekureba uye hwekupfuura nekugadzirisa kukanganisa kudiki kwekutaura kwakapiwa naEinstein muna 1905. Zviratidzo zvaPlanck zvaive zvakaenzana neizvo zvakashandiswa naLorentz muna 1899. Zvichienderana nebasa raPlanck, pfungwa ye relativistic mass yakagadziriswa naGilbert Newton Lewis naRichard C. Tolman (1908, 1909) nekutsanangura huwandu sehukama hwehuwandu hwehuwandu. Saka tsananguro yekare ye longitudinal uye transverse mass, iyo yaitsanangurwa sehukama hwehuwandu hwehuwandu hwekumhanyisa, yakava isina basa. Pakupedzisira, Tolman (1912) akadudzira relativistic mass kungoita sehuwandu hwemuviri. Zvisinei, mabhuku mazhinji emazuva ano nezve relativity haashandise pfungwa ye relativistic ye mass, uye yave kutariswa sechinhu chakakosha. Mubvunzo: Chii chakava chisina basa?
tsanangudzo yekare yehuremu hwekureba uye hwakatambanudzwa