AnswersAA-F26 Physical ScienceIntroduction to Motion

Introduction to Motion Answers

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1
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What is the purpose of a reference point?

A
to provide a standard system of measurement
B
to establish a point from which to measure future distance, or if movement has occurred
C
to determine the speed of an object in miles per hour
D
to provide a standard from which to evaluate variables in an experiment
2
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What did you include in your response? Check all that apply.

A
Distance is the total amount they each walked.
B
Zamir took a longer path.
C
Their displacement is the difference from where they started and where they stopped.
D
Their displacement is the same because they both ended at the same position as they started.
73872

Assume each tick mark represents 1 cm.

Answers:
The object moves cm to the left.:2
What is the total distance the object travels? cm:16
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91013✔ 16

A
9
B
10
C
13
D
✔ 16
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✔ 02345

A
✔ 0
B
2
C
3
D
4
E
5
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17✔ 19212325

A
17
B
✔ 19
C
21
D
23
E
25
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greater thanless than✔ equal to

A
greater than
B
less than
C
✔ equal to
73881

How are all paths that have a displacement of zero similar?

Answer:

All paths with a displacement of zero share the characteristic that the starting position and the ending position are the same. Regardless of the distance traveled or the complexity of the path taken, if the object returns to its original point of origin, the net change in position (displacement) is zero.

73882

Recall the previous question and the scenario with Zamir and Talia finding their way through a maze.Why is their displacement the same when the distance each traveled was different?

Answer:

Distance is the total path length traveled by each person, so if they took different routes, their distances will differ. Displacement is the straightline change in position from the starting point to the ending point. Since Zamir and Talia started at the same entrance and ended at the same exit, their displacement is identical regardless of the paths they took.

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