A $4\mathrm{.}92-$ton elevator is supported by a standard

steel cable of $3\mathrm{.}2-$in$.{?}^2$ cross section and an

effective modulus of elasticity of $12*{10}^6$ psi.

As the elevator is descending at a constant $284$

$f\frac{t}{m}in,$ an accident causes the top of the cable,

$87\mathrm{.}15$ ft above the elevator, to stop suddenly.

Estimate the maximum tensile stress

developed in the cable $($see the figure below$).$

Submit your answer in ksi.

Steel cable

$-E=12{10}^6$