AnswersAA-F26 Physical ScienceSpeed and Velocity

Speed and Velocity Answers

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1
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The skier’s average speed is [___] m/s

Answer:

22.4

2
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The object is traveling at a velocity of [___] m/s.

Answer:

3

3

[___]

A
A
B
B
C
C
4

Ben’s average velocity is [___] m/s.

A
0.2
B
0.3
C
–0.3
D
–0.2
5

Which statements describe the motion of the object represented by the graph? Select three options.

A
The object is moving away from the origin.
B
The object is moving towards the origin.
C
The object started at the origin.
D
The object started at 2 meters.
E
The object is traveling at a constant velocity.
6

The object represented by this graph is moving

A
away from the origin at a constant velocity.
B
away from the origin at a decreasing velocity.
C
toward the origin at a constant velocity.
D
toward the origin at a decreasing velocity.
7

Which runner had the fastest speed in the race?

Answers:
Selection 1:A
Selection 2:C
Selection 3:C
8

The starting position of this object is [___] m.

Answer:

3

9

[___]

A
A
B
B
C
C
10

[___] is moving the fastest.

A
Car A
B
Car B
C
Car C
11

Based on the graph, describe what is happening between 4 and 6 seconds.

A
The object is moving away from the start at a constant speed.
B
The object is not moving.
C
The object is returning to the start at a constant speed.
D
The object is changing speed.
12

[___] m/s

A
3
B
4
C
12
13

[___] m/s

A
-2
B
-1
C
0
D
1
E
2
14

A 100-meter sprint is a race using only the straight side of a racetrack. A 400-meter sprint is a race that makes one complete lap around a racetrack. Why are velocity and speed the same for a 100-m sprint but not a 400-m sprint?

Answer:

In the 100meter sprint, the race is in a straight line, so the distance and displacement are the same, making speed and velocity equal. In a 400meter sprint, the runner ends at the starting point, so the displacement is zero. Speed is calculated using distance, but velocity is calculated using displacement, so the velocity for the 400meter sprint is zero while the speed is not.

15

[___]

A
A
B
B
C
C
16

What did you include in your response? Check all that apply.

A
Distance and displacement are the same in the 100-m sprint.
B
Velocity and speed are the same in the 100-m sprint.
C
Distance is 400 meters in the 400-m sprint.
D
Displacement is zero in the 400-m sprint.
E
Velocity is zero in the 400-m sprint.

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