AnswersRKAA- Second Semester Civics and Citizenship 0.5 NewCivil Discourse

Civil Discourse — Unit test Answers

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41
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Read the scenario.Clara is a high school student in the United States. In 2019, she and her classmates participated in the Global Youth Climate Strike.

A
They left school to attend a demonstration.
B
They refused to show up for work.
C
They boycotted environmental organizations.
D
They staged sit-ins in their classrooms.
42
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A 50 kg pitcher throws a baseball with a mass of 0.15 kg. If the ball is thrown with a positive velocity of 35 m/s and there is no net force on the system, what is the velocity of the pitcher?

A
−0.1 m/s
B
−0.2 m/s
C
−0.7 m/s
D
−1.4 m/s
43

What is determined by calculating the slope of the position vs time graph?

p
position
v
velocity
d
distance
d
displacement
44

During the summer in Tempe, Arizona, city workers provide heat relief to people experiencing homelessness. Why is heat relief important for this group of people specifically?

A
Extreme summer heat poses a danger to people without shelter.
B
People without shelter require warm clothing when they are outside.
C
People experiencing homelessness need ovens or hot plates to cook their meals.
D
People with high body temperatures need medical attention.
45

Objects 1 and 2 collide and stick together. Which best describes the momentum of the resulting single object?

A
It is less than the momentum of object 1 but greater than the momentum of object 2.
B
It is greater than the momentum of object 1 but less than the momentum of object 2.
C
It is equal to the momentum of object 1 minus the momentum of object 2.
D
It is equal to the momentum of object 1 plus the momentum of object 2.
46

Which best describes a force?

A
a vector with magnitude and direction
B
a vector with speed and strength
C
a vector with direction only
D
a vector with strength only
47

Review the photograph from a protest in Los Angeles in 2021.

A
All people deserve adequate housing.
B
Housing should be free for all citizens.
C
All Americans have access to affordable housing.
D
Housing is guaranteed in the US Constitution.
48

What is the momentum of a 5 kg object that has a velocity of 1.2 m/s?

A
3.8 kg • m/s
B
4.2 kg • m/s
C
6.0 kg • m/s
D
6.2 kg • m/s
49

Koto traveled 5,000 meters north from her house with an average velocity of 4.5 m/s.What was the time of her trip? (There are 60 seconds in 1 minute.)

1
18.5 minutes
2
20.4 minutes
2
2 hours
3
3 hours
50

What is an endorsement?

A
an anonymous campaign contribution
B
a formal way of showing support for a candidate
C
an attempt to sway the public through propaganda
D
an appearance in front of a legislative committee
51

Sheila weighs 60 kg and is riding a bike. Her momentum on the bike is 340 kg • m/s. The bike hits a rock, which stops it completely and throws Sheila forward onto the pavement.If there is no net force on the system, what is Sheila’s velocity immediately after she is thrown from the bike?

A
1.8 m/s
B
2.0 m/s
C
5.0 m/s
D
5.7 m/s
52

Sayid made a chart listing data of two colliding objects.According to the law of conservation of momentum, what is the missing value in the chart?

Question illustration
A
4
B
6
C
10
D
16
53

Football helmets are made with padding that helps reduce head injuries when a player collides with an object. Which best explains how the padding reduces injuries?

A
It extends the time of the collision.
B
It reduces the time of the collision.
C
It eliminates the reaction force of the object.
D
It eliminates the action force of the object.
54

A tugboat is pulling a barge into a harbor. The barge is exerting a force of 3000 N against the tugboat.Which force would most likely allow the tugboat to move the barge into the harbor?

A
4500 N in the opposite direction of the barge
B
3000 N in the opposite direction of the barge
C
3000 N in the same direction of the barge
D
4500 N in the same direction of the barge
55

The chart shows masses and velocities of four objects.

Question illustration
A
W, X, Y, Z
B
Z, Y, X, W
C
Z, X, W, Y
D
Y, W, X, Z
56

In a car, how does an air bag minimize the force acting on a person during a collision?

A
It increases the change in momentum of the person.
B
It decreases the change in momentum of the person.
C
It increases the time it takes for the person to stop.
D
It decreases the time it takes for the person to stop.
57

A bowling ball collides with a pin and pushes the pin toward the right. Which describes the reaction force?

A
The pin pushes the bowling ball toward the right.
B
The pin pushes the bowling ball toward the left.
C
The bowling ball pulls the pin toward the right.
D
The bowling ball pulls the pin toward the left.
58

The table represents the speed of a car in a northern direction over several seconds.

Question illustration
C
Column 1 should be titled “Time,” and Column 2 should be titled “Velocity.”
C
Column 1 should be titled “Velocity,” and Column 2 should be titled “Time.”
C
Column 1 should be titled “Time,” and Column 2 should be titled “Acceleration.”
C
Column 1 should be titled “Acceleration,” and Column 2 should be titled “Time.”
59

Based on the tug of war pictured below, what is the net force?

Question illustration
A
–190 N
B
10 N
C
–10 N
D
190 N
60

What kind of acceleration occurs when an object speeds up?

A
positive
B
negative
C
neutral
D
zero

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