Dallas Says That Any Change in Velocity Is Directly Proportional $\Delta$

question 51

Multiple Choice

Dallas says that any change in velocity is directly proportional to the time interval over which the change took place.Dana says that is true only when the acceleration is constant.Which one,if either,is correct?

• A)Dana,because it is true only when the acceleration is constant.
• B)Dallas,because we can define a_x,avg so that \(\Delta\)v_x = a_x,avg\(\Delta\)t.
• C)Dallas,because a_x,avg always is equal to \[\frac { a _ { x , i } + a _ { x , f } } { 2 }\] .
• D)All the above are correct.
• E)Only (a)and (b)above are correct.

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Definitions:

Type I Error

The incorrect rejection of a true null hypothesis, often called a "false positive."

Type II Error

A statistical error that occurs when a false null hypothesis is not rejected, also known as a "false negative" finding.

Two-Tailed Hypothesis

A form of statistical hypothesis testing where the alternative hypothesis specifies that the parameter of interest differs from the null hypothesis.

Population Mean

The average value of all the members of a set or population, denoting the central tendency.