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Kinetic and Potential Energy
 
This model illustrates the variation of the kinetic K and of the potential U energies of the boy, descending in a sledge from the top of a mountain of complex section without friction. The diagram and the numerical values of the kinetic and the potential energies of the boy are displayed. It is possible to change the mass of the body m and the section of the mountain. Put your attention to the fact, that the sum of the kinetic and of the potential energies in the process of motion of the boy is constant and equals the initial potential energy before the start from the top of the mountain.
 
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