Hydraulic Car Jack Help: Answering a Question on Hydraulics | PDF Attached

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A user seeks assistance with a hydraulics question related to a hydraulic car jack, having partially answered the first part but struggling with the second. They attached a PDF for reference but expressed uncertainty about the accuracy of their response. The user also inquired about how to post images directly in the forum to avoid future attachment issues. They mentioned a preference for older forums for accessing important information, which they find challenging with current image hosting practices. The post aims to provide valuable insights for future readers.
Dcoz
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I've attached a PDF with a question related to hydraulics. I've answered (not sure if it was correctly) the first part of the question, but not sure where to start on the second.

Thank you for any help.

p.s. sorry for it being in PDF format. If someone is able to tell me how I can directly post images in my post, I'll start doing that.
 

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No attachment here.
 
Upload your images to site like imageshack and then paste the 'forum' link.
 
Somethng must be wrong with me with all these missing attachments today. I blame it on the invention of tabs (current count 64).
 
Thank you rock.freak667, but I'm use to going to an old forum to find the important information needed, contained in an image deleted on a image hosting site.

Hopefully this post will help others for generations to come. :smile:
 

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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