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1018

  • one year ago

Block B in the figure weighs 752 N. The coefficient of static friction between block and table is 0.32; angle θ is 33°; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary.

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  1. 1018
    • one year ago
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    |dw:1441017490655:dw|

  2. mathmate
    • one year ago
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    |dw:1441019774244:dw| Nice problem. Does the above completed figure correspond to what was intended?

  3. mathmate
    • one year ago
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    |dw:1441019918401:dw|

  4. 1018
    • one year ago
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    hey! sorry for the late reply, yes, that is the problem

  5. 1018
    • one year ago
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    is 0.32 coefficient of friction? how do i do that?

  6. mathmate
    • one year ago
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    |dw:1441020009343:dw| Set up the equations: equilibrium at the knot: \(mg = T ~tan(\theta)\) At the point of movement, \(\mu~Mg=T\) Solve for m.

  7. 1018
    • one year ago
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    oh, thanks but i meant how did you solve for that, and how did you get 0.32?

  8. mathmate
    • one year ago
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    The coefficient of static friction is the ratio of the maximum friction force and the normal reaction between two objects when neither of the objects is moving. (ref. wiki plus corrections)

  9. mathmate
    • one year ago
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    It's given in the question: "The coefficient of static friction between block and table is 0.32; "

  10. 1018
    • one year ago
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    oh! i did not see that sorry

  11. 1018
    • one year ago
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    thanks haha

  12. mathmate
    • one year ago
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    You're welcome! :)

  13. 1018
    • one year ago
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    wait ill try to solve

  14. mathmate
    • one year ago
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    Post your answer for checking if you wish. I may be offline, but may be back later. I'll bet someone else will jump in to help! :)

  15. 1018
    • one year ago
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    ok thanks again!

  16. 1018
    • one year ago
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    hey i got the answer! thanks! @musicmate

  17. mathmate
    • one year ago
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    Can you post your answer if you want to check?

  18. 1018
    • one year ago
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    it's 156.27. but it already said that the answer was correct haha

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