1. The problem statement, all variables and given/known data 2. Relevant equations Torque = Force x Distance Shear stress = Force/Area 3. The attempt at a solution I know how to do this question as I've seen the mark scheme. However, initially I did it wrong. What I did was as follows: Torque = Force x Distance therefore Torque/Distance = Force therefore Force = 200/(50/100) = 400 N Then I used Shear stress = Force/Area and plugged in the value of 400N and that of the area to find the shear stress. As I said, I know that this is not the way to calculate the answer to this question. However, I want to know, what shear stress does the shear stress obtained via this method actually refer to? As in, when I did the force (that I found via T=Fr) divided by the area of the shaft, I got a value for shear stress, what is this value referring to? The shear stress at the end of the shaft? Or?