An Old 78 Rpm Record Rotates Through an Angle of 320°

question 29

Multiple Choice

An old 78 rpm record rotates through an angle of 320° as it slows down uniformly from 78.0 rpm to 22.8 rpm.What is the magnitude of the angular acceleration of the record?

• A)2.34 rad/s²
• B)5.46 rad/s²
• C)6.50 rad/s²
• D)8.35 rad/s²
• E)10.9 rad/s²

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Definitions:

Significant Change

An alteration in data or a pattern that is considered to be of importance due to its impact or magnitude.

Goodness of Fit

A statistical test to see how well sample data fits a distribution from a population with a normal distribution.

Degrees of Freedom

The number of independent values or quantities that can variably assign to a statistical calculation without breaking any constraints.