Just want to make sure you know you don't have to know this. Div B prohibited topics include coefficient of friction.http://img.sparknotes.com/content/testp ... pulley.gif
A problem I just came up with. Solved it and just want to make sure I'm right since I doubt my coach will know how to solve it (it's not that complicated).
In the diagram from the link, angle θ is 37 degrees and mass m is 15 kg. The coefficient of friction between mass m and the inclined plane is 0.4. Assume the pulley is frictionless. What are the maximum and minimum masses for mass M if the system is in equilibrium?
Strange... I got an upward force of 16.82 N (with sig figs that's 20 N).Okay, so as far as I can tell, if the following system is in static equilibrium, the downward force on the fulcrum would be 16.82; I just wanted to check here and see if that makes sense:
Wouldn't it be downwards since the outside effort force going upwards is less than the load force going down?Strange... I got an upward force of 16.82 N (with sig figs that's 20 N).Okay, so as far as I can tell, if the following system is in static equilibrium, the downward force on the fulcrum would be 16.82; I just wanted to check here and see if that makes sense:
SinceWouldn't it be downwards since the outside effort force going upwards is less than the load force going down?Strange... I got an upward force of 16.82 N (with sig figs that's 20 N).Okay, so as far as I can tell, if the following system is in static equilibrium, the downward force on the fulcrum would be 16.82; I just wanted to check here and see if that makes sense:
The force exerted by the lever is up, but the force on the lever would be down, right?SinceWouldn't it be downwards since the outside effort force going upwards is less than the load force going down?Strange... I got an upward force of 16.82 N (with sig figs that's 20 N)., then
. Furthermore, if
, then static equilibrium is achieved. (Think downwards as negative and upwards as positive)
Yes, at least that's how I see it. Oh, okay, I get it.The force exerted by the lever is up, but the force on the lever would be down, right?
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