As Shown in the Figure,two Blocks Are Connected by a Very

question 141

Short Answer

As shown in the figure,two blocks are connected by a very light string,and the upper block is pulled upward by a different string.The masses of the upper and lower blocks are 300 g and 240 g,respectively.The string between the blocks will break if it exerts a force that exceeds 3.6 N,and the string that pulls the combination upward will break if it exerts a force that exceeds 7.8 N.
(a)What is the largest upward acceleration that the blocks can be given without either string breaking?
(b)If the upward acceleration is slightly higher than this,which string breaks,the upper one or the lower one?

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Predictive Validity

The extent to which a score on a scale or test predicts future performance or behaviors.

Norms

Shared standards of acceptable behavior and beliefs within a group or society.

Reliability

Refers to the consistency of a measure or test over time.

Standard Deviations

A statistical measure that quantifies the amount of variation or dispersion of a set of data values from their mean.