Question

The wheel weighs 20 lb and rests on a surface for which μB = 0.2. A cord wrapped around it is attached to the top of the 30 lb homogeneous block. If the coefficient of static friction at D is μD = 0.3, determine the smallest vertical force that can be applied tangentially to the wheel which will cause motion to impend.

Answer 1

P = 13.3lb

Step-by-step explanation:

From the attached files, The possible friction analysis cases are:

Impeding motion at 'B'

Impending motion at 'D'

Impending motion at 'B and D'

Please continue by going through the attachments for a step by step resolution of the problem.