A Very Thin Uniform Rod,2

question 18

Multiple Choice

A very thin uniform rod,2.40 m long and of weight 135 N,has a frictionless hinge at its lower end.It starts out vertically from rest and falls,pivoting about the hinge.Just as it has rotated through an angle of 55.0°,what is the downward acceleration of the end farthest from the hinge?

• A) 5.02 m/s²
• B) 8.03 m/s²
• C) 9.80 m/s²
• D) 12.0 m/s²
• E) 19.6 m/s²

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Definitions:

Population Variance

Population variance quantifies the dispersion of a population's values, measuring how each value differs from the mean of the population.

Chi-Squared Test

A statistical test used to determine the significant difference between observed frequencies in one or more categories and their expected frequencies.

Test Statistic

A calculated value from sample data used to make a decision on whether to reject the null hypothesis in statistical hypothesis testing.

Population Random Variable

A variable that incorporates the randomness from a population and is used for probability distributions in statistical calculations.