# A copper rod of length L =18.0 in is to be twisted by torques T (see figure)

## Question:

A copper rod of length L =18.0 in is to be twisted by torques T (see figure) until the angle of rotation between the ends of the rod is 3.08.

(a) If the allowable shear strain in the copper is 0.0006 rad, what is the maximum permissible diameter of the rod?

(b) If the rod diameter is 0.5 in, what is the minimum permissible length of the rod?

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