The aid of its own engines and a steam-powered catapult

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A fighter jet is launched from an aircraft carrier with the aidof its own engines and a steam-powered catapult. The thrust of itsengines is 3.90 x 105 N. In being launched from rest itmoves through a distance of 72.8 m and has a kinetic energy of 6.03x 107 J at lift-off. What is the work done on the jet by the catapult?

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