What happens to the object at rest if (i) f_(s)=0 (ii) f_(s)=f_("ext") (iii) f_(s)="max"

What happens to the object at rest if (i) f_(s)=0 (ii) f_(s)=f_("ext")

1.	What happens to the object at rest if (i) f_(s)=0 (ii) f_(s)=f_("ext") (iii) f_(s)="max"
Answer» Solution :(i) if theobjectis atrestand soexternalforce is APPLID on the objectthe staticfrictionactingon theobject is zero`(f_(s)= 0)` (ii) If the objectis at restand there ISAN externalforceappliedparallelto thesurfacethen THEFORCE of staticfrictionactingon theobjectis exactlyequal tothe externalforceappliedon theobject`(f_(s)= F_(ex))`Butstill the STATICFRICTION`f_(s) ` islessthan `mu_(s) N` (iii) Whenobjectbeginsto sidethe staticfriction`(f_(s))`actingon theobjectattainsmaximum.