Recent content by masterflex

cool, thx.

I was thinking about it and drawing circles and lines. Can you tell me if this is a general rule (please look at attachment where I draw circles): when lines are drawn (simulating a rubber band around 2 pulleys), adding blue arcs from both circles will always equal 360 degrees? The blue arc...

Homework Statement I've attached a picture of the problem. I couldn't get beta=120 degrees, for pulley B. How do you get that. Could the question be mistakenly missing this info in the question?

omg. I can't believe that. I spent like 2 hours analyzing it and reading the book again to see where I went wrong. You're awesome :)

How'd you get the right answer? I checked it at least 15 times and kept getting the wrong answer over and over and over again. Maybe another one of my forces is pointing in the wrong direction? If you could be so kind as to look over my work, it is attached in the original post -- I also drew...

Here's where I think the direction of friction is: 1) when motion down the incline is impending, friction points up the incline (Part c). 2) when motion up the incline is impending, friction points down the incline (Part a).

Friction -- signs of the forces correct? Homework Statement I have a question about part c). I've attached the picture of the problem. It's a typical friction problem on an inclined plane, and I get the wrong answer so there's something about my setup that's wrong. Homework Equations...

makes total sense pizza (when you think about it physically). I didn't initially interpret it physically. The "top curve minus bottom curve" to find the area between 2 curves works only for dx; that's what the teacher told us. But for dy, the "top curve" is the right curve. I can see it now.

Homework Statement The picture is found here (top picture): http://www.iastate.edu/~statics/examples/centroid/centroida.html#ysubc Homework Equations The Attempt at a Solution I get the wrong sign (ie: negative area) when I integrate to find the area between 2 curves when I...

Thanks guys. Even though something is pinned though, there can still be a moment of the reaction forces at that point. I have a test tomorrow so when I'm done with it (may take a day or 2 for me to get remotivated, but I'll post something that shows that). I'll also try your way to figure out...

Homework Statement I've attached a picture of my problem (with diagram): 4.70 . "For the frame and loading show, determine the reactions at A and C." From the diagram, you can see that the metal object is made up of 2 parts: 1) A to B 2) B to D Homework Equations The...

that's it? awesome -- thanks a lot! It makes sense now.

my work... I've attached a picture of my work (where the minus sign confused me). And you can see that I get a different Theta_x. My work: theta_x = 75.5 degrees theta_y = 30 degrees theta_z = 64.3 degrees solution book: theta_x = 104.5 degrees theta_y = 30 degrees theta_z = 64.3...

minus sign in "forces in space" problem. Homework Statement see picture for problem. Homework Equations please see a picture (one is of problem, the other contains the relevant formula). The Attempt at a Solution I was able to solve the whole thing, then looked at the solution...

I understand Thanks a lot for your help guys. I got this solution from a random professor that I just walked in the door to talk to. I also realized what I was struggling with: there's a force along the line of AB (but not necessarily constrained to that physical distance; just in line with...