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posted by  machuelito on 5/8/2008 7:25:25 PM  |  status: Live  

Chapter 9: Bodies In Equilibrium: Elasticity and Fracture

Course Textbook Chapter Problem
Algebra Based Physics Physics: Principles with Applications (6th) by Giancoli 9 N/A
Question Details:
A large uniform "butcher block" rests on two supports and has a weight hanging from its end. The block has a mass of 100 kg and a length of 2 meters. If L = 1.61 meters, what is the minimum value for the hanging weight to the nearest tenth of a kilogram if the configuration is to remain stable?
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posted by richmondMike on 5/8/2008 10:55:50 PM  |  status: Live
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machuelito's comment:
"thanks"
Response Details:
The weight of the block is (100kg)(9.81m/s2) = 981N. The free-body diagram of the system is shown below.
+clockwise Στat B = 0; FA(1.61m) - (981N)(0.610m) + w(0.390m) = 0.
Let FA = 0.
∴
∴The mass is
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