- #1
XodoX
- 203
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I do not understand how to solve static equilibrium questions. Like those:
Or this one
http://www.chegg.com/homework-help/questions-and-answers/a-uniform-120-lb-beam-is-supported-in-a-horizontal-positionby-a-pin-and-cable-as-shown-in--q701621
The second one with the pin is especially hard, imo.
I don't even know what the basic equation here is. The book dosen't tell you this. It's always [itex]\Sigma[/itex][itex]\tau[/itex]=... something else. So I do have to create my own equation each time, basically. Is this correct? Depending on whatever the problem is. I don't get it. Can someone please explain this to me?
The figure shows a uniform, horizontal beam (length = 10 m, mass = 25 kg) that is
pivoted at the wall, with its far end supported by a cable that makes an angle of 51o with
the horizontal.(mass = 60 kg) stands 3.0 m from the pivot, what is the tension in the
cable?
Or this one
http://www.chegg.com/homework-help/questions-and-answers/a-uniform-120-lb-beam-is-supported-in-a-horizontal-positionby-a-pin-and-cable-as-shown-in--q701621
The second one with the pin is especially hard, imo.
I don't even know what the basic equation here is. The book dosen't tell you this. It's always [itex]\Sigma[/itex][itex]\tau[/itex]=... something else. So I do have to create my own equation each time, basically. Is this correct? Depending on whatever the problem is. I don't get it. Can someone please explain this to me?