A Ball Attached to the End of a String Is

question 55

Multiple Choice

A ball attached to the end of a string is swung around in a circular path of radius r.If the radius is doubled and the linear speed is kept constant,

• A)the centripetal acceleration remains the same.
• B)the centripetal acceleration increases by a factor of 2.
• C)the centripetal acceleration decreases by a factor of 2.
• D)the centripetal acceleration increases by a factor of 4.
• E)the centripetal acceleration decreases by a factor of 4.

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Definitions:

Multiple Regression Model

A statistical technique that uses multiple independent variables to forecast the outcome and determine the effect of each variable on the dependent variable.

Correlation

A statistical measure that expresses the extent to which two variables change together, ranging from -1 to +1.

Null and Alternative Hypotheses

The null hypothesis is a statement of no effect or no difference, and the alternative hypothesis is what we aim to support, indicating some effect or difference.

Multiple Regression Model

A statistical methodology that incorporates several explanatory variables to deduce the future value of a dependent variable.