AnswersWA-Physical Science BIntroduction to Motion

Introduction to Motion Answers

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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?

d
determining how fast the snail moves
a
acting as a standard unit of measure
d
determining the displacement of the snail
a
acting as a reference point for detecting motion
2
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best

A
A train moves uphill as it travels in a straight path.
A
A person walks 2 miles north and 2 miles west.
A
A ball rolls from the top to the bottom of a hill.
A
A race car starts and ends at the same point on a track.
3

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?

1
10 meters
3
35 meters
4
45 meters
5
55 meters
4

most likely

f
from the bottom of a hill to the top
o
on a circular nature trail
o
on a sidewalk from his house to the mall
f
from the beginning of a straight track to the end
5

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?

1
1
5
5
7
7
1
13
6

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?

2
2 cm
8
8 cm
1
12 cm
1
15 cm
7

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
W
W
X
X
Y
Y
Z
Z
8

best

T
The red car traveled a shorter distance, but the displacement of the cars was equal.
T
The green car traveled a shorter distance, but the displacement of the cars was equal.
T
The green car had a shorter displacement, but the distance traveled by the cars was equal.
T
The red car had a shorter displacement, but the distance traveled by the cars was equal.
9

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

a
a reference point
d
distance
d
displacement
s
standard units
10

The diagram shows a vertical number line.

Question illustration
–
–16
–
–12
1
12
1
16

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