Struggling with Physics Problems? Get Expert Help Now!

AI Thread Summary
The discussion revolves around a student struggling with physics problems related to angular momentum and conservation of momentum. They express a need for assistance in understanding how to approach these problems. Other participants suggest starting by writing down initial ideas and posting them in a dedicated homework help section for further guidance. Additionally, there is a suggestion to use Yahoo Messenger for more detailed discussions. The conversation emphasizes the importance of collaboration and seeking help in tackling challenging physics concepts.
lucianb
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I got these problems from my teacher, my physics teacher of course, they're about angular momentum, conservation of momentum etc. The problem is that i have no ideea how to even begin solving them. If there is anyone out there who thinks that he/she is good in physics can u give me a hand. I really need some help.
 
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Well, try to make a start, write down some ideas, and post a thread in the homework help section, and we'll see what we can help you with.
 
Do you have yahoo messenger, so we can have a more detailed talk?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
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Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
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