Introduction to Motion Answers

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Which scenario best describes an object with a displacement of zero?

A
A train moves uphill as it travels in a straight path.
B
A person walks 2 miles north and 2 miles west.
C
A ball rolls from the top to the bottom of a hill.
D
A race car starts and ends at the same point on a track.
2
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Julie finds a snail on the sidewalk and wants to know whether or not the snail moves throughout the day. She places a single mark on the sidewalk next to the snail.What will Julie use the mark for initially?

A
determining how fast the snail moves
B
acting as a standard unit of measure
C
determining the displacement of the snail
D
acting as a reference point for detecting motion
3

Four different objects are placed on a number line at 0. The chart describes the motion of each object.Using the information in the chart, the distance and displacement of each object can be determined. Which object has a distance that is three times as great as its displacement?

Question illustration
A
W
B
X
C
Y
D
Z
4

A linear track begins at 0 meters and has a total distance of 100 meters to the finish line. Juliet starts at the 10-meter mark while practicing for a race.After running 45 meters, how far is she from the beginning of the track?

A
10 meters
B
35 meters
C
45 meters
D
55 meters
5

Sonya is playing a board game, and each space on the board game measures 1 centimeter. She moves her game token 5 spaces up from the start position. Then she moves it 5 spaces to the left. Finally, Sonya moves her token 2 spaces down.What is the total distance the token moved?

A
2 cm
B
8 cm
C
12 cm
D
15 cm
6

What is required in order to determine whether or not an object moves?

A
a reference point
B
distance
C
displacement
D
standard units
7

An object is placed at 0 on a number line. It moves 3 units to the right, then 4 units to the left, and then 6 units to the right. What is the displacement of the object?

A
1
B
5
C
7
D
13
8

An object starts at position 12 on a horizontal line with a reference point of 0. What is the position of the object if it moves 14 units to the left?

A
–26
B
–2
C
2
D
26
9

Nancy and Hiyang are training for a race. They entered some of their training notes in a chart.Which information should be added to the chart in order find out who ran a greater distance?

Question illustration
A
the time spent running each day
B
the reference point used each day
C
the units used to measure distance each day
D
the location used by the runners each day
10

Which scenario best describes motion?

A
a toy train in position 4 on a number line
B
a race track that is 100 meters long
C
a ball rolling from point A to point B
D
a student living 150 miles from Chicago

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