A Stone Is Tied to the End of a String

question 19

Multiple Choice

A stone is tied to the end of a string and is swung with constant speed around a horizontal circle with a radius of 1.5 m.If it makes two complete revolutions each second, its acceleration is:

• A)0.24 m/s²
• B)2.4 m/s²
• C)24 m/s²
• D)240 m/s²
• E)2400 m/s²

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Definitions:

Experimental Research

A research method that investigates causal relationships by manipulating one variable to see its effect on another, under controlled conditions.

Independent Variable

The variable that is manipulated in an experiment to test its effects on the dependent variable.

Dependent Variable

A variable in an experiment that is expected to change in response to manipulations of the independent variable.

Correlational Study

A research methodology that examines the relationship or association between two or more variables without determining causal direction.