PSAD Refresher 111: Friction on Blocks Connected by Links | Statics of Rigid Bodies

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SITUATION: Blocks A and B have a mass of 3 kg and 9 kg, respectively, and are connected to the weightless links shown in Figure FRN – 225. The coefficient of static friction between the blocks and the contacting surfaces is 0.30.
1. Determine the largest vertical force P (N) that can be applied at the pin C without causing any movement.
A. 33.5 C. 26.7
B. 31.8 D. 45.9

2. Calculate the normal reaction (N) at B at largest P.
A. 88.3 C. 55.6
B. 61.3 D. 45.6

3. Calculate the normal reaction (N) at A at largest P.
A. 45.6 C. 61.3
B. 55.6 D. 88.3

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