A Ball at the End of a String Is Swinging

question 32

Multiple Choice

A ball at the end of a string is swinging as a simple pendulum. Assuming no loss in energy due to friction, we can say for the ball that

• A) the potential energy is maximum at each end of the motion.
• B) the mechanical energy changes and is maximum where the kinetic energy is minimum.
• C) the mechanical energy changes and is maximum where the kinetic energy is maximum.
• D) the kinetic energy does not change but the potential energy does.

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Definitions:

Keynesian Model

An economic theory stating that active government intervention is necessary to manage economic fluctuations and stimulate demand during downturns.

Money Supply

The sum of all funds available in an economy, including cash, coins, and checking and savings account balances, at a particular point in time.

Foreign Exports

Products or services that are manufactured in one nation and purchased by consumers in a different country.

Say's Law

Say's Law, also known as the law of markets, is an economic principle which suggests that production creates its own demand, positing that a supply of goods will ultimately lead to the creation of an equivalent demand.