Get Expert Physics Help for Collisions - Step-by-Step Guide

AI Thread Summary
The discussion focuses on solving physics problems related to collisions using conservation principles. Participants emphasize the importance of applying conservation of linear momentum in both x and y directions. There is confusion regarding a specific formula involving angles, with contributors noting its complexity and questioning its validity. The problem is likened to the Compton effect, suggesting that angle calculations can be derived more straightforwardly. Overall, the conversation highlights the need for clarity in the application of physics formulas in collision scenarios.
naren11
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Hello,

http://img219.exs.cx/img219/9273/lastscan19rc.jpg

Can anybody explain how to startup the questions? Thank you!
 
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naren11 said:
Hello,

http://img219.exs.cx/img219/9273/lastscan19rc.jpg

Can anybody explain how to startup the questions? Thank you!

For the first question : use conservation of linear momentum and conservation of energy. That's all you'll need to do.

marlon
 
Be sure that you apply momentum-conservation in both the x and y direction of the frame of reference.

marlon
 
The formula they gave looks weird...That \vartheta_{2} is written as a function of \vartheta_{1} & \cos\vartheta_{2} :bugeye:

Since the problem reminds somehow of the classical HS theory of Compton effect,i assume that \vartheta_{2} can be found exactly...

Daniel.
 
dextercioby said:
The formula they gave looks weird...That \vartheta_{2} is written as a function of \vartheta_{1} & \cos\vartheta_{2} :bugeye:

Since the problem reminds somehow of the classical HS theory of Compton effect,i assume that \vartheta_{2} can be found exactly...

Daniel.

I AGREE (hey that feels strange :smile: ). The formula i get has a v1' and a cosine of theta_1, instead of v1 * cos(theta2). It seems quite stupid to me that we'd set up a formula for theta 2 that actually contains the theta2

marlon
 

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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