A Mass Is Pressed Against (But Is Not Attached To)

question 96

Multiple Choice

A mass is pressed against (but is not attached to) an ideal horizontal spring on a frictionless horizontal surface. After being released from rest, the mass acquires a maximum speed v and a maximum kinetic energy K. If instead the mass initially compresses the spring twice as far:

• A) Its maximum speed will be 2v and its maximum kinetic energy will be 2K.
• B) Its maximum speed will be 2v and its maximum kinetic energy will be K.
• C) Its maximum speed will be v and its maximum kinetic energy will be 2K.
• D) Its maximum speed will be 2v and its maximum kinetic energy will be 4K.
• E) Its maximum speed will be 4v and its maximum kinetic energy will be 2K.

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Definitions:

Murray Weidenbaum

An American economist known for his contributions to public policy, environmental economics, and as a key economic advisor during the Reagan administration.

Thorstein Veblen

A prominent American economist and sociologist known for his theories on the social implications of economic behaviors, particularly conspicuous consumption and leisure class.

Benjamin Franklin

A founding father of the United States, known for his contributions to the fields of science, politics, and economics.

MPC

Marginal propensity to consume (MPC) represents the ratio of the change in consumer spending to the change in income, showing how much income will be spent rather than saved.