Recent content by Niall11

Hi I am struggling on this question myself and seem to be having the same problem in that I don't have an equation for finding Hp using the data given, jayohtwo can I ask where you found h = (P2 - P1)/y ? Thanks

OK I'm starting to get my head around it now thanks a lot for the help!

So V = 1.57 Sin(45) = 1.11 vertical and] V = 1.57 Cos(45) =1.11 Horizontally, Assuming that B can only move horizontally then it would have the same velocity as Vao horizontal which = 1.11ms-1, then using this data I could find Wab and the acceleration, am I right in thinking B moves...

Do you mean using V (vertical) = V Sinθ and V (Horizonal) = V Cosθ to calculate the vertical and horizontal components?

I thought that the tangential velocity was the value Voa, the length of the arm multiplied by its angular velocity?

thanks for your reply haruspex, I'm not sure how to break it up into horizontal and vertical components I've really hit a blank!

I've been struggling with this question and wondered if anyone could help; For the mechanism shown determine for the angle θ = 45°: (I) the velocity of the piston relative to the fixed point O (V bo) (ii) the angular velocity of AB about point A (Wab) iii) the acceleration of point B relative to...

Thanks a lot that was a big help, oh right I didn't realize ill look next time!

oh right I have on my notes that least 2nd moment of area is π/32(D^4-d^4)! so least 2nd moment of area = π/64 (D^4-d^4) = π/64 (0.08^4-0.06^4) = 1.374 * 10^-6 now effective L comes out at 2.94m and length 5.94m! I'm hoping that is correct if I've used all the right formulae

thanks for the fast reply, I was thinking I needed the area of the whole column for some reason. yes area of circle = π*r^2 so area of outer circle - area of inner circle = cross sectional area of column; π (0.04)^2 - π(0.03)^2 = 2.199*10^-3 m^2 meaning L = 118.7 * sqrt(2.75*10^-6 /...

1. The problem statement, all variables and given/known I have been asked to calculate the minimum length of this column (attatched) at which buckling is likely to occur Homework Equations E.S.R = sqrt(π^2*E / σ) 2nd moment of Area I = AK^2 E.S.R = L/K I= π/32*(D^4-d^4) 3. The Attempt at a...