- #1

kittymaniac84

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## Homework Statement

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 3.14 x 10^5 N. In being launched from rest it moves through a distance of 85.1 m and has a kinetic energy of 5.63 x 10^7 J at lift-off. What is the work done on the jet by the catapult?

## Homework Equations

w=sumF*displacement=0.5mv[tex]^{2}_{f}[/tex]-0.5mv[tex]^{2}_{o}[/tex]

## The Attempt at a Solution

I am unsure how to start this. They don't give me the final velocity or the mass. so I don't think i can use that equation. Is this a tricky question? Is the answer 5.63 x 10^7 J or 5.63 x 10^7 J times 85.1m= 4.79 x 10^9