stuckne1 said:Homework Statement
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.
Homework Equations
W = FD
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.)
stuckne1 said:it was 1/2(m)(v)^2 or something.
The answer was -7.6 x 10 ^7
Thanks!
Nonconservative forces are external forces that do not follow the principle of conservation of mechanical energy. These forces can change the total mechanical energy of a system, such as kinetic or potential energy, and are typically dissipative in nature.
Nonconservative forces can do work on an object by dissipating or transforming energy. This means that they can decrease the kinetic energy of the object and increase its potential energy, or vice versa. The total work done by nonconservative forces is equal to the change in mechanical energy of the object.
The work done by nonconservative forces can cause a change in the motion of an object. If the work done is positive, meaning the nonconservative forces increase the total mechanical energy of the object, the object will experience an increase in speed. If the work done is negative, the object will experience a decrease in speed.
The work done by nonconservative forces can be calculated using the formula Wnc = ΔK + ΔU, where Wnc is the work done by nonconservative forces, ΔK is the change in kinetic energy, and ΔU is the change in potential energy. This formula takes into account the change in mechanical energy of the object due to the nonconservative forces.
No, nonconservative forces always result in a change in the mechanical energy of an object. This is because these forces are dissipative and do not follow the principle of conservation of mechanical energy. Any work done by nonconservative forces will result in a change in the object's kinetic and/or potential energy.