The sum of the kinetic and potential energies of a system of objects is conserved:
A)only when no external force acts on the objects
B)only when the objects move along closed paths
C)only when the work done by the resultant external force is zero
D)always
E)none of the above

Question

Quizplus · Accepted Answer

The Answer of The sum of the kinetic and potential energies of a system of objects is conserved:
A)only when no external force acts on the objects
B)only when the objects move along closed paths
C)only when the work done by the resultant external force is zero
D)always
E)none of the above

The Sum of the Kinetic and Potential Energies of a System