Off Topic > Off Topic
Calling all physics nerds! I am dumb as a box of rocks
Col. Derontchi:
Can someone help me with the damn problem?
AndroFox:
if you want to get actual help, you might want to make a proper illustration AND find a better place to ask
bithead9:
I've taken a quick look at it, and I do not believe you can solve that knowing only the weight of the guitar. I set up a few equations, but I can't get around not knowing the angle that guitar makes with the ground (another way of putting it : the angle it makes with the force normal to the book) Also the diagram isn't clear, why is there a force of tension at the top?
Juncoph:
--- Quote from: bithead9 on January 25, 2017, 10:05:04 PM ---I've taken a quick look at it, and I do not believe you can solve that knowing only the weight of the guitar. I set up a few equations, but I can't get around not knowing the angle that guitar makes with the ground (another way of putting it : the angle it makes with the force normal to the book)
--- End quote ---
measure the angle between the green line and the angle between the guitar and the green line, add the two angles, and use that for your angle. round it also
Col. Derontchi:
--- Quote from: AndroFox on January 25, 2017, 09:55:34 PM ---if you want to get actual help, you might want to make a proper illustration AND find a better place to ask
--- End quote ---
it is proper. And I don't really have anywhere else. I've spent hours on this.
--- Quote from: bithead9 on January 25, 2017, 10:05:04 PM ---I've taken a quick look at it, and I do not believe you can solve that knowing only the weight of the guitar. I set up a few equations, but I can't get around not knowing the angle that guitar makes with the ground (another way of putting it : the angle it makes with the force normal to the book) Also the diagram isn't clear, why is there a force of tension at the top?
--- End quote ---
I've estimated the angle from the wall to be about 79 degrees. The ground is irrelevant. My teacher put that there when he was helping me out but it might have been torque. I don't remember which.