In a "worst-case" design scenario, a 2000 kg elevator with broken cables is falling at 4.00 m/s when it first contacts a cushioning spring at the bottom of the shaft. the spring is supposed to stop the elevator, compressing 2.00 m as it does so. spring coefficient is 10.6 kn/m. during the motion a safety clamp applies a constant 17000-n frictional force to the elevator. what is the speed of the elevator after it has moved downward 1.00 m from the point where it first contacts a spring?