 #1
 2
 0
Alright, so I've scanned my book and I am thuroughly confused.
Of course, I'm not looking for an answer. I'm just trying to get started here.....
what I'm thinking is that I need to find the vertical component of the P vector to be equal to first gravity, and second the vertical component involving friction....then use that to find the vector at 50 degrees, and thus find the horizontal component and then find the magnitude of the entire vector....
Some things that are confusing me. First, the normal vector. Is it pointing to the right, or is it vertical? Second, the friction vector....from what I gather, since the motion of the force P is upwards, the friction is supposed to oppose that and thus would point downwards with gravity.
Lastly, what equation do I even begin with? My professor in lecture today went over what friction is, how to find it using normal vector and the coefficient of friction...but he didnt even come close to mentioning how to apply it to problems. The previous problems I managed to find similar examples in the book for, but the book doesn't appear to mention anything like this problem. Normally I would ask the instructor, but the problems are webbased and due by 8am tomorrow...which is before anyone has recitation. I got all the other problems right, this is the last one I'm working on.....
anyway, I attached a picture of the exact problem....I know the text is illegible, that's why I included the text above....
I'd like to thank in advance anyone who offers their help.
My friend has an identical problem (the numbers are different), and we can't even start working on the problem.A block of mass 6.00 kg is pushed up against a wall by a force P that makes a 50.0° angle with the horizontal as shown in Figure P5.46. The coefficient of static friction between the block and the wall is 0.207. Determine the possible values for the magnitude of P that allow the block to remain stationary.
Of course, I'm not looking for an answer. I'm just trying to get started here.....
what I'm thinking is that I need to find the vertical component of the P vector to be equal to first gravity, and second the vertical component involving friction....then use that to find the vector at 50 degrees, and thus find the horizontal component and then find the magnitude of the entire vector....
Some things that are confusing me. First, the normal vector. Is it pointing to the right, or is it vertical? Second, the friction vector....from what I gather, since the motion of the force P is upwards, the friction is supposed to oppose that and thus would point downwards with gravity.
Lastly, what equation do I even begin with? My professor in lecture today went over what friction is, how to find it using normal vector and the coefficient of friction...but he didnt even come close to mentioning how to apply it to problems. The previous problems I managed to find similar examples in the book for, but the book doesn't appear to mention anything like this problem. Normally I would ask the instructor, but the problems are webbased and due by 8am tomorrow...which is before anyone has recitation. I got all the other problems right, this is the last one I'm working on.....
anyway, I attached a picture of the exact problem....I know the text is illegible, that's why I included the text above....
I'd like to thank in advance anyone who offers their help.
Attachments

7.7 KB Views: 312