Special Relativity: Doppler Effect?

AI Thread Summary
The discussion revolves around a homework problem related to the Doppler Effect in the context of special relativity. The participant expresses confusion about their calculations, specifically regarding the velocity (v) and an accidental subtraction of 550. Despite the error, they seek confirmation on whether their overall procedure is correct. Other participants provide feedback, indicating that the approach looks good overall. The conversation highlights common challenges faced when solving problems in special relativity.
mintsnapple
Messages
50
Reaction score
0

Homework Statement


f4i45x.png

Homework Equations



Shown below

The Attempt at a Solution


j7yur8.png


I know I probably did something wrong...but what?
 
Physics news on Phys.org
Solving for v went wrong. As you did not provide steps of this, I cannot tell what exactly.
 
Ahhhh! I subtracted by 550 by accident. However, is my procedure correct?
 
b6ekaf.png

How does this look?
 
Looks good.
Certainly the fine for the red light would have been cheaper.
 
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...
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...
Back
Top