(Solved): The aluminum rod \( A B \) is bonded to the brass rod \( B D \). Knowing that portion \( C D \) of ...
The aluminum rod \( A B \) is bonded to the brass rod \( B D \). Knowing that portion \( C D \) of the brass rod is hollow and has an inner diameter of \( 40 \mathrm{~mm} \), determine the angle of twist at \( A \).