a steel bar 1 " sauare 6 ' long is to be used as a column.ends are free to rotate put may not be displaced stress is limited to 30,000 psi.
i believe my teacher expect conform code AISC.
what size shaft is required to transmit 100 Hp @ 1000 rpm ,if max shear stress is 10,000 psi .angle of twist must be less than 1 degree /ft .shaft is made of steel.