Читать книгу Fundamentals of Heat Engines - Jamil Ghojel - Страница 18

A force F does work on a particle when the particle undergoes displacement in the direction of the force:

If the force is variable and moving along a straight line,

Newton' Second Law for a particle can be written as

For an incremental change in distance, ds = vdt; hence

Finally,

(1.3)

The work done by a force is equal to the change in kinetic energy. This equation is the simplest form of the conservation of energy equation.