Rocketman:

The coefficient for clean steel should be around 0.6-0.8 but I'm not sure of the value for plastic on steel(plexiglas on steel is about 0.5 and plexiglas on plexiglas is near 0.8). Would the forcing cone surface have a higher coefficient of friction? Also, I don't see it but did you include the weight of the load along with the wad in your friction force(Normal)?

Kind Regards,

Raimey
rse

Last edited by ellenbr; 09/10/08 09:29 PM.