Friction Exercise Problems determining smallest force, P Lec 53 #dryfriction #engineeringmechanics

Question:
If the center of gravity of the stacked tables is at G and the stack weighs 100 lb , determine the smallest force P the boy must push on the stack in order to cause movement. The coefficient of static friction at A and B is U(s)=0.3. The tables are locked together.
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