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Unformatted text preview: the velocity of the particle at the beginning and the end of the loop must be the same. • Why? Because if the velocity is any different, the kinetic energy of the particle will be different, meaning that mechanical energy must not have been conserved. Thus we come to our first statement about conservative forces: If a body is under the action of a force that does no net work during any closed loop, then the force is conservative. If work is done, the force is nonconservative....
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