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The torques shown are exerted on pulleys $A,B,$ and $C,$ where $T_1=3$kip$*in.$ and $T_2=7\mathrm{.}4$kip$*in.$ Assume that both shafts are solid and the diameter of shafts $AB$ and $BC$ to be $1\mathrm{.}3$ in $.$ and $1\mathrm{.}8$ in $.,$ respectively.

Determine the maximum shearing stress in shaft $AB.$

The maximum shearing stress in shaft $AB$ is $$ ksl$.$

Determine the maximum shearing stress in shaft BC$.$

The maximum shearing stress in BC is Ksi