Recent content by blargh4fun

Thanks for the feedback! Unfortunately, I'm still stuck. I've tried solving this problem several of the ways previously discussed, but I get answers that don't make sense and don't match. I'm going to rehash the startup and show where I'm stuck, and hopefully someone can provide some...

I've made another observation, and now I'm not sure. I'm concerned on Entities 3 and 4 as to whether I can do what I'm showing or not (due to the center of mass). To double check the numbers I have, I setup Entities 3 and 4 from the right side instead of the left, and the numbers I calculated...

Honestly, I'm primarily interested in the bending moments at the center of each block. Maybe I'm going about this the wrong way. Maybe I need to rethink my FBDs. Instead of the Bodies 1-4 like above, I create Entities 1-4 like so: Entity 1: Left half of Body 1. Solve for unknown moment...

solving for alpha and a: I_net * alpha = F*r where r is distance from COM to F. gives alpha = F*r/I_net M*a=F so a=F/M

Ok, try this. Body1 - y forces: F-F21=m1*a Body1 - moments about center: (F+F21)*L1/2 - M21 = I1 *alpha Body2 - y forces: F12-F32=m2*a Body2 - moments about center: (F12+F32)*L2/2 + M12 - M32 = I2 * alpha Body3 - y forces: F23+F43=m3*a (being careful with signs) Body3 - moments about...

paisiello2, Thanks very much for your feedback. Would you be willing to expound on your previous comments? 1. Missing internal bending moments. Would you be willing to write out the equation(s) for one of the bodies (say body 1) so I understand what you mean? 2. Parallel axis theorem...

Homework Statement A body (let's call it a rod for simplicity) is in frictionless space, and is composed of 4 smaller sub-rods fused (cannot break) end to end. Each sub-rod has a unique mass (m1, m2, m3 and m4) and length (l1, l2, l3, and l4), but they all have the same diameter d. A force...

I'm a little confused. I realize integration has to be done at some point, but isn't the surface area of the sphere 4 \pi r^{2} regardless of the charge?