Homework Help: Physics

Posted by Donald on Sunday, November 11, 2012 at 6:35am.

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?

Physics - drwls, Sunday, November 11, 2012 at 6:39am
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

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