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

To find the work done on the jet by the catapult, we need to use the work-energy principle, which states that the work done on an object is equal to the change in its kinetic energy.

The kinetic energy at lift-off is given as 4.30 * 10^7 J. The initial kinetic energy is zero because the jet starts from rest.

The work done by the catapult is equal to the change in kinetic energy of the jet. Therefore, we can calculate it as:

Work = Kinetic Energy at lift-off - Initial Kinetic Energy

Work = 4.30 * 10^7 J - 0

Work = 4.30 * 10^7 J

Therefore, the work done on the jet by the catapult is 4.30 * 10^7 J.