Find the work done by nonconservative forces in stopping the plane.

stuckne1

1. The problem statement, all variables and given/known data
Find the work done by nonconservative forces in stopping the plane.

A 18000 {\rm kg} airplane lands with a speed of 92 {\rm m/s} on a stationary aircraft carrier deck that is 115 {\rm m} long.


2. Relevant equations
W = FD


3. The attempt at a solution

18000 * 92 * 115 = 190440000 J

Unless it's wanting 1.9 * 10^8 = 190000000 J (which seems wrong since detail is lost)

(I don't think that's 2 significant digits.)

berkeman

The best way to solve this type of problem is with energy considerations. What was the KE of the plane just before it traps on the carrier deck? What is the KE right after it is stopped by the wire? Wher did that energy go?

stuckne1

it was 1/2(m)(v)^2 or something.

The answer was -7.6 x 10 ^7

Thanks!

berkeman

Does that mean that you calculated the correct answer? What are the units of the answer?

stuckne1

Yes, the units of the correct answer was in joules.