QUESTION: 585 Topic Exam C: Section 3 (science)

Graphs I-IV and Data Table I represent the motion of objects in one dimension as detected by a motion detector. Motion in the positive direction represents motion away from the motion detector and motion in the negative direction represents motion toward the motion detector.

The data listed in Data Table I could be used to construct which graph?

Graph I
Graph II
Graph III
Graph IV

Answer(s): C

Explanation:

Data Table I includes time and velocity information that indicates it would be used to make a velocity versus time graph. This eliminates choices A and D since Graphs I and IV are both position versus time graphs. Of the two velocities versus time graphs, Graph II shows an object with constant velocity since the line on this graph is horizontal; this indicates that the data table used to make Graph II should have the same value for the velocity for all of the times. This is not the case for Data Table I. This leaves Graph III as the only option. For this velocity versus time graph the velocity decreases in magnitude over time as seen on the Graph III. The values for the velocity in Data Table I reflect this decrease in magnitude.

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QUESTION: 586 Topic Exam C: Section 3 (science)

Graphs I-IV and Data Table I represent the motion of objects in one dimension as detected by a motion detector. Motion in the positive direction represents motion away from the motion detector and motion in the negative direction represents motion toward the motion detector.

If objects A, B, C and D represented in Graph IV were in a foot race, which would win?

Answer(s): B

Explanation:

Looking at the position versus time graph in Graph IV you can determine first the direction each object is moving in. Remember the slope of the position versus time graph is the velocity of the object. Since all of the objects have straight lines for the position versus time graph they are all moving at constant velocity. Objects A, B, and D have positive slopes and are therefore moving in the positive direction. Object C, however has a negative slope and is therefore moving in the negative direction. Object C is going backwards away from the finish line so cannot win the race. The magnitude or steepness of the slope determines how fast the object is moving. Object B has the steepest slope and is therefore moving the fastest. Since it is moving the fastest and they are all moving with constant velocity, object B will win the race.

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QUESTION: 587 Topic Exam C: Section 3 (science)

Graphs I-IV and Data Table I represent the motion of objects in one dimension as detected by a motion detector. Motion in the positive direction represents motion away from the motion detector and motion in the negative direction represents motion toward the motion detector.

If objects A, B, C, and D represented in Graph IV were in a race, which would come in 3rd place?

Answer(s): A

Explanation:

Object A has the third steepest slope and would therefore come in 3rd in a race with Objects A, B, C, and D.

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QUESTION: 588 Topic Exam C: Section 3 (science)

Graphs I-IV and Data Table I represent the motion of objects in one dimension as detected by a motion detector. Motion in the positive direction represents motion away from the motion detector and motion in the negative direction represents motion toward the motion detector.

Before conducting this experiment, what would be the most important thing to check to ensure accurate results?

the diameter of the objects used.
the table where you will record the data.
the weight of the objects used.
the motion detector.

Answer(s): D

Explanation:

The weight and diameter of the objects and the table you create will not affect the results; however, your motion detector will affect your results.

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QUESTION: 585 Topic Exam C: Section 3 (science)

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QUESTION: 586 Topic Exam C: Section 3 (science)

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QUESTION: 587 Topic Exam C: Section 3 (science)

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QUESTION: 588 Topic Exam C: Section 3 (science)

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