A 2000 kg (19,600 N) elevator with broken cables in a test rig is falling at 4.00 m/s when it contacts a cushioning spring at the bottom of the shaft. The spring is intended to stop the elevator, compressing 2.00 m as it does so . During the motion a safety clamp applies a constant 17,000 N friction force to the elevator. What is the necessary force constant k for the spring?

A 2000 kg (19,600 N) elevator with broken cables in a test rig is falling at 4.00 m/s when it contacts a cushioning spring at the bottom of the shaft. The spring is intended to stop the elevator, compressing 2.00 m as it does so . During the motion a safety clamp applies a constant 17,000 N friction force to the elevator. What is the necessary force constant k for the spring?

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hysics.com/myct/itemView?assignment ProblemID=189028777 2 W S You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 13-m-high hill, then descends 19 m to the track's lowest point. You've determined that the spring can be compressed a maximum of 2.5 m and that a loaded car will have a maximum mass of 450 kg. For safety reasons, the spring constant should be 15% larger than the minimum needed for the car to just make it over the top. X 3 E D 80 F3 C $ 4 888 F4 ק|ר| R F % 5 V F5 T G 6 B ▼ 162023#/ Part A Y What spring constant should you specify? Express your answer with the appropriate units. View Available Hint(s) k= Value Submit Part B V = Submit Provide Feedback H What is the maximum speed of a 370 kg car if the spring is compressed the full amount? Express your answer with the appropriate units. ► View Available Hint(s) % MacBook Air Value & 7 μÃ μA 3 A4 F7 U N 3 ** 8 Units Units DII FB 1 M ( 9 www. K ? ? DD FO CO O…
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