A Very Small 100-G Object Is Attached to One End

question 21

Multiple Choice

A very small 100-g object is attached to one end of a massless 10-cm rod that is pivoted without friction about the opposite end.The rod is held vertical,with the object at the top,and released,allowing the rod to swing.What is the speed of the object at the instant that the rod is horizontal?

• A) 0.71 m/s
• B) 4.0 m/s
• C) 1.4 m/s
• D) 2.8 m/s
• E) 1.8 m/s

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Definitions:

Six-month Moving Average

A method of smoothing data by calculating the average of six consecutive months' worth of data, continuously updated month by month.

Mean Absolute Deviation

A statistical measure of the average absolute deviations of a set of values from their mean, indicating variability within the dataset.

Forecast Error

The difference between the actual outcomes and the predictions made by forecasting models.

Exponential Smoothing

A time series forecasting method for smoothing data points by giving more weight to recent observations while exponentially decreasing the weights for older observations.