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

question 9

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:

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true; a measure of the risk of a Type I error.

SRS

Simple Random Sampling, a method of selecting a sample in which each member of the population has an equal chance of being included.

Null Hypothesis

A statistical hypothesis that assumes no significant difference or effect exists between certain states or parameters in a population.

Significance Level

A threshold in hypothesis testing that determines the probability of rejecting the null hypothesis when it is actually true.