Two Blocks of Masses 20 Kg and 9

question 58

Multiple Choice

Two blocks of masses 20 kg and 9.0 kg are connected together by a light string and rest on a frictionless level surface.Attached to the 9.0-kg mass is another light string,which a person uses to pull both blocks horizontally.If the two-block system accelerates at 0.80 m/s²,what is the tension in the second string attached to the 9.0-kg mass?

• A)23 N
• B)14 N
• C)16 N
• D)7.2 N
• E)25 N

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Definitions:

Dependent Variable

The outcome variable or the predicted variable in a regression equation.

Repeated-Measures ANOVA

A statistical technique used to compare means across more than two conditions or times, with the same subjects participating in all conditions.

ANCOVA

Stands for Analysis of Covariance, a statistical technique that blends ANOVA and regression to evaluate whether the means of a dependent variable are equal across groups, adjusting for the effects of other variables.

Multiple Regression

A statistical technique that uses several explanatory variables to predict the outcome of a response variable.