The wheel has weight WA and rests on a surface for which the coefficient of friction is μB. A cord wrapped around the wheel is attached to the top of the homogeneous block of weight WC. If the coefficient of static friction at D is μD determine the smallest vertical force that can be applied tangentially to the wheel which will cause motion to impend.

Given:

WA = 20 lb

μB = 0.2

WC = 30 lb

μD = 0.3

h = 3 ft

b = 1.5 ft

Transcribed Image Text:

WA т FB NB Wc h/2 Fp Np