Recent content by mholland

is it just c dot=0.5(a-bcosθ)-1/2.(bsinθ) ?

I'm struggling here as I've not done diferentiation in a few years. The cos law states: c=(a2+b2-2abcosθ)1/2 I'm trying to figure out how to differentiate this, so if c were a length, what the velocity with which c grows as θ increases (ie c dot) Any pointers would be great! If its easier, a...

The short .3m vertical red strut is stationary, and the long 1.3m (and the red triangular attachment) are rotating clockwise, with the ends of the damper attached where shown

Thanks for taking the time to reply, for the red bar, say 20cm (i'm still waiting on cad drawings for accurate measurements), and yes the .3m post is fixed Yer gravity acts downwards and there is a spring, which is the main slider tube shown below, forcing the bar to rotate as it extends. The...

Hi I'm a bit stuck on a problem I'm trying to figure out. I am trying to design a damper, the layout is show below: (apologies for the poor 'cad' drawing!) So far i know: I for the beam, how much energy needs to be absorbed by the damper (4500j) and the stroke (15mm). The maximum loading...