A Ball Rolled Along a Horizontal Surface Maintains a Constant

question 85

Multiple Choice

A ball rolled along a horizontal surface maintains a constant speed because

• A)its velocity remains constant.
• B)no horizontal force acts on it.
• C)of inertia.

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Definitions:

Z-score

A numerical metric indicating how a particular value compares to the average of a dataset, expressed by the number of standard deviations it lies from the mean.

P-value

The likelihood of encountering experimental results that are at least as significant as the actually observed results, given the null hypothesis is assumed to be accurate.

Pooled Variance

A method used in statistics to combine variances from two or more groups to estimate a common variance when they are assumed to be equal.

Independent Samples

Samples drawn from two populations in such a way that the selection of a sample from one population does not influence the selection of a sample from the other population.