An Object Is Moving Along a Straight Line in the Positive

question 92

Multiple Choice

An object is moving along a straight line in the positive x direction. The graph shows its position from the starting point as a function of time. Various segments of the graph are identified by the letters A, B, C, and D.

-What was the instantaneous velocity of the object at the end of the eighth second?

• A)+7.5 m/s
• B)+0.94 m/s
• C)-0.94 m/s
• D)+1.1 m/s
• E)zero m/s

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Definitions:

Random Group Assignment

A method in experimental design to ensure every participant has an equal chance of being assigned to any group, thus minimizing preexisting differences between those assigned to different groups.

Construct

An abstract concept that is specifically chosen or created to explain a given phenomenon.

True-Experimental Design

True-experimental design is a type of experimental research methodology that involves the manipulation of variables, control of extraneous variables through random assignment, and the comparison between a control group and one or more experimental groups to determine causal relationships.

Cause and Effect

A relationship between two events where one event (the cause) directly results in the other event (the effect).