The electrical power supplied to the motor is much greater than the answer to (b).Explain how the principle of conservation of energy applies to this system.
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Other Forms of Energy than Mechanical Energy
At this point, we deal with all other forms of energy by lumping them into a single group called other energy (OE). Then we can state the conservation of energy in equation form as KEi + PEi +Wnc +OEi = KEf + PEf + OEf.
All types of energy and work can be included in this very general statement of conservation of energy. Kinetic energy is KE, work done by a conservative force is represented by PE, work done by nonconservative forces is Wnc, and all other energies are included as OE. This equation applies to all previous examples; in those situations OE was constant, and so it subtracted out and was not directly considered.
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