13. A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.3 x 105 N. In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 4.5 x 107 J at lift-off. What is the work done on the jet by the catapult?

 

Work – Energy Theorem tells us

 

 

 

Launched from rest means

Final Kinetic Energy is

The work done by the engine is

 

 

 

 

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This page last updated on January 11, 2020