As a 16,000 kg jet plane lands on an aircraft carrier, it’s tailhook snags a cable to slow it down. The cable is attached to aspring with spring constant 6.0 x 104 N/m.
(a) If the spring stretches 32 m to stop the plane, what was itslanding speed.
（b) A second, identical plane, attempts to land with the samespeed, but when the spring is stretched halfway, to only 16 m, adefect causes the cable to snap. What speed had the plane slowed tobefore the cable broke?
