A Mass M Is Released from a Height 80 Cm $\mu$

question 51

Multiple Choice

A mass m is released from a height 80 cm from the right-hand side of the track shown in the diagram at right.There is only friction acting along the horizontal portion 30 cm either side of the midpoint O with a kinetic coefficient of friction of $\mu$ _k = 0.4.Determine (i) how many times does the mass m pass through the midpoint O,and (ii) how far from the midpoint does it come to rest.

• A)6,.1 m
• B)6,.2 m
• C)3,.2 m
• D)3,.1 m
• E)1,2 cm

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Definitions:

Population Variance

A measure of the dispersion of a set of data points in a population, calculated as the average of the squared deviations from the mean.

Sample Variance

A measure of the dispersion or spread of a set of data points in a sample, illustrating how much the data differ from the mean.

Grouped Data

Data that has been organized into categories, classes, or intervals, often to simplify analysis and find frequency distributions.

Ungrouped Data

Data that has not been organized into groups or categories and is presented in raw form.