With a distributed torque, the internal torque $T$ changes with position instead of being constant along the shaft Given distributed torque $t_{0},$ with units $\frac{N\cdot m}{m},$ over a length $x,$ the total applied torque is $ T=t_{0}x $ This means you can replace a uniform distributed torque over some length $L$ with a resultant torque: $ T_{resultant}=t_{0}L $