A Block Is First Placed on Its Long Side and Then

question 41

Multiple Choice

A block is first placed on its long side and then on its short side on the same inclined plane. The block slides down the plane on its short side but remains at rest on its long side. A possible explanation is:

• A) the short side is smoother
• B) the frictional force is less because the contact area is less
• C) the center of gravity is higher in the second case
• D) the normal force is less in the second case
• E) the force of gravity is more nearly down the plane in the second case

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Definitions:

Sample Size

Sample Size refers to the number of observations or individuals in a subset of a population used for statistical analysis.

Parameter

A characteristic or constant factor that defines or limits a system; in statistics, it is a numerical attribute of a population.

Unbiased Estimator

A statistic used to estimate a parameter that is expected to be equal to the true parameter of the population.

Population Parameter

A numerical characteristic or measure of an entire population, such as a mean (average), variance, or proportion.