for anyone who's bored enough

A 5-ton elevator is supported by a standard steel cable of 2.5-in.2 cross section and an
effective modulus of elasticity of 12 x 106 psi. As the elevator is descending at a constant 400 ft/
min, an accident causes the top of the cable, 70 ft. above the elevator, to stop suddenly. Estimate
the maximum elongation and maximum tensile stress developed in the cable

Question

for anyone who's bored enough


A 5-ton elevator is supported by a standard steel cable of 2.5-in.2 cross section and an
effective modulus of elasticity of 12 x 106 psi. As the elevator is descending at a constant 400 ft/
min, an accident causes the top of the cable, 70 ft. above the elevator, to stop suddenly. Estimate
the maximum elongation and maximum tensile stress developed in the cable