Question

Q.1) A uniform ladder of mass m=40kg rests against a smooth vertical wall making an angle 30 degree with the horizontal. The lower end of ladder rests on a rough floor having mu=1/root 3.An electrician having mass80kg attempt climb the ladder to repair house wiring. Fraction of length that can be encountered by the electrician before the ladder begins to slip will be:- (a) 1/2 (b)1 (c)1/4 (d)1/3

Answer 1