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Q. As a 14,500 kg jet plane lands on an aircraft carrier, its tail hook snags a cable to slow it down. The cable is attached to a spring with spring constant 58,800 N/m. If the spring stretches 26 m to stop the plane, what was the plane's landing speed?

Q. What vertical height does the block reach above its starting point? What speed does it have when it slides back down to its starting point?

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