... Haha, not sure if that's sarcasm or a genuine question - if you look at my scanned picture I actually have 2 equations. But, for the sake of anyone who may come across this, the solution is thus:
Sum F = ma (upwards +ve)
so F = ma (1)
Sum T=0 about C.O.M CW +ve
So F*xg -T = 0
So T...
thanks,
yeah I thought about using D'Alemberts principal to solve it but from my uni days I remembered that you don't really need to use it for classical mechanics problems. Plus I don't like the F -ma = 0 approach... just seems wrong to me.
Cheers for the confirmation,
Dave
For statics, yes, but I think for an accelerating body it has to be about the centre of mass.
In my FBD, the reaction moment would change depending on where you take moments about as there are no other forces acting on it. So T - F*r = 0 and depending on where you take moments from (i.e. r)...
OK.. think I've realized my problem (well, one of many!)
For pure translation the sum of the forces = mass * acceleration but the sum of the moments only equals zero about the centre of mass...
Could someone confirm this for me?
Thanks
Hello All,
I've been searching for days to try and solve this but I'm going round in circles so thought I'd fire it out to into the ether! I'm analysing a gantry system that is essentially cantilevered from one end but the part of the problem I'm struggling with can be simplified thus...