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# If the energy of the system is constant, and all forces are conservative, which statement is...

If the energy of the system is constant, and all forces are conservative, which statement is true:

 a. KEi + PEi = KEf +PEf b. KEi + KEf = PEi + PEf c. ΔKE = ΔPE d. PEi = PEf

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If only conservative forces are involved in the system and internal energy of system is constant than sum of total initial energy is equal to sum of total final energy.

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