A Block of Weight W Is Suspended by a String

question 1

Multiple Choice

A block of weight W is suspended by a string of fixed length.The ends of the string are held at various positions as shown in the figures below. In which case, if any, is the magnitude of the tension along the string the largest?

• A)case A
• B)case B
• C)case C
• D)case D
• E)The magnitude of the tension will be the same in all four cases, since the string must support the entire weight of the block.

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Definitions:

Internal Consistency Reliability

A measure of how well the items on a test measure the same concept or construct, often assessed by Cronbach's alpha.

Parallel Forms Reliability

The consistency of the results of two tests constructed in the same way from the same content domain.

Internal Validity

The extent to which a study establishes a trustworthy cause-and-effect relationship between a treatment and an outcome.

Observed Score

The score actually obtained by an individual on a test or measurement.