The Sum of the Kinetic and Potential Energies of a System

question 52

Multiple Choice

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

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Definitions:

Critical Election

An election that signifies a major shift in the electorate's preferences, leading to a new political alignment or party system.

Voter Turnout

The percentage of eligible voters who cast a ballot in an election, a critical measure of democratic participation.

Preindustrial Age

A period before the widespread use of machines and the advent of industrial production processes, characterized by agrarian societies and handmade goods.