Question

A 17,000-kg airplane lands with a speed of 82 m/s on a stationary aircraft carrier deck that is 115 m long. find the work done by nonconservative forces in stopping the plane

Answer 1

In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force. Nonconservative force for this question refers to FRICTIONAL force. 

By conservation of energy, 

Work done by Frictional force = Kinetic energy = 1/2(17000)(82)^2 = 57MJ