heneverthesurfacesincontacttendtomoveormovewithrespecttoeachother,theforce
offrictioncomesintoplay
(a)onlyiftheobjectsaresolid.
(b)onlyifoneoftheobjectsisliquid.
(c)onlyifoneofthetwoobjectsisgaseous.
(d)irrespectiveofwhethertheobjectsaresolid,liquidorgas.eous
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write the question properly plzz
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