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:

Social Evolution

The gradual development and progression of societies and cultures over time through mechanisms such as adaptation, selection, and innovation.

Biological Evolution

The process through which species of organisms undergo changes over time through genetic variation and natural selection.

Physiological Response

A natural, automatic bodily reaction to stimuli, which can include changes in heart rate, hormone levels, or muscle tension.

Behavioral Response

A behavioral response is an observable action or set of actions taken by an individual in reaction to an external or internal stimulus.