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    Engineering Physics(Work done and energy) Help!!!

    The result is surprising as the catapult actually do much more work than the engine itself (almost 21 times more)!!
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    Engineering Physics(Work done and energy) Help!!!

    Q.2 engine has done 23000x87 of work , total work has to be 4.5 x10^7 J as this is the lift off energy(NOT SURE)? so work done by catapult should be 4.5x10^7-23000x87=42999000
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    Engineering Physics(Work done and energy) Help!!!

    Q2 AND Q5 are the questions I struck in at the minute. For Q 2 , I wonder i could simply use change of kinetic energy=Work done, does the catapult gain the same amount of energy as the Jet fighter?? For Q.5, i have no idea where to start, could someone at least give me some kind of direction...
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