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Answer :
The work done by nonconservative forces is equal to the initial kinetic energy: Work done by nonconservative forces = -56,576,000 J
To find the work done by nonconservative forces in stopping the plane, we need to first find the plane's initial kinetic energy.
The formula for kinetic energy is KE = 1/2mv^2, where m is the mass of the object and v is its velocity.
Plugging in the values given in the question, we get:
KE = 1/2 (22,000 kg) (64 m/s)^2
KE = 56,576,000 J
So the initial kinetic energy of the plane is 56,576,000 J.
To stop the plane, nonconservative forces such as friction and air resistance must act upon it. These forces will do negative work, removing energy from the system.
The work done by nonconservative forces can be found using the work-energy principle, which states that the net work done on an object is equal to its change in kinetic energy.
Since the plane is coming to a stop, its final kinetic energy is zero. Therefore, the work done by nonconservative forces is equal to the initial kinetic energy:
Work done by nonconservative forces = -56,576,000 J
Note that the negative sign indicates that the nonconservative forces did negative work, removing energy from the system.
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