A Grindstone of Radius 4

question 10

Multiple Choice

A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 12 rad/s over the next 4.0 seconds. Assume that the angular acceleration is constant.
-What is the magnitude of the angular acceleration of the grindstone?

• A)0.50 rad/s²
• B)1.0 rad/s²
• C)4.5 rad/s²
• D)9.0 rad/s²
• E)18 rad/s²

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Definitions:

Little or No Association

A term used in statistics to describe a situation where there is very weak or no relationship between two variables being studied.

Very Strong Association

A term in statistics indicating a high level of correlation between two variables.

Linear Association

A relationship between two variables where the change in one variable is proportionally related to a change in the other variable.

Positive Association

A relationship between two variables where an increase in one variable is associated with an increase in the other.