posted by Donald .
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 2.10 105 N. In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 4.30 107 J at lift-off. What is the work done on the jet by the catapult?
Subtract the work done by the engines from the KE at release. That will be the energy provided by the catapult.
4.30*10^7 - (2.1*10^5)*87 = _____ J