Recent content by jonnybmac

Thank you for your help

I get also 3252.38 cm^4. Which doesn't tie into any of his calculations and I have no idea why he would use the span of the beam and the sum of the loads per kN/m to calculate this(His Ixx calculations). His calculations to me do noy make sense but I'm no expert in the structural field. As i...

Sorry, would this be sufficient? Many thanks Jonathan

Hi Chestermiller and thank you for reading my post. I don't have any diagrams myself as I was more just trying to view the calculations to understand how they are done. I have a photo of the finished beams in place if that may help to visualize and I have also done a diagram for the cross...

<<moderator note, moved from a homework forum, hence the template.>> 1. Homework Statement I'm trying to work out what 2.29 is in an equation an engineer has used for what i believe is supposed to be the second moment of area. See photo for report. Homework Equations See screenshot photo...

Wow, I really appreciate the time you have put into such an informative reply with picture and mathematical models (Not discrediting Al_'s input and thank you also). I actually jumped the gun in terms of trying to learn something before I was actually ready. Since I am distance learning, the...

So if P = mav P = Γω mav = Γ(rpm)So as rpm increases, it needs to reduce either Γ or mav. But as rpm increases, v increases, Since m is constant, it means then v(rpm) = Γma so an increase to the v(rpm) means a reduction of Γ and/or a Sorry if this is what's already been stated. My head feels...

Homework Statement I am having difficulty understanding the conversion between power and rotation at the engine and at the wheel. Can you please state which parts are right and wrong, and why please as I think I've spent that long on researching I've confused myself with too much information...

Thank you for clearing that up for me

Thank you for your response, and apologies for the lack of units - I have amended the original post. So centripetal acceleration is not the same as gravitational acceleration? how would you link the radius of the Earth and its gravitational acceleration at its surface then? I was of the...

Homework Statement I am having trouble linking gravity to the radius of the Earth and angular velocity. I was using this as a solid method to confirm the equation for values of a different sort based on centripetal acceleration. When inputting the values though it does not add up and I cannot...

I think I have cracked it thank you. When in tension it is only loaded axially so the strength is force the over cross-section area, but in compression you have buckling that stops the member reaching its maximum strength, and that if you look at the bending equation or Euler's column formula...

Homework Statement Why are cables thin when used as ties? Why are they not equally as thick as say struts? Homework EquationsThe Attempt at a Solution Is it because when in tension the tie cannot buckle? or because when in tension it cannot shear? Steel has the same compressive strength as...