AnswersPBCSD_Grade_Forgiveness_2003310_Physical Science_S2_2022Lab: Newton's Laws of Motion

Lab: Newton's Laws of Motion — Unit test Answers

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is the distance traveled during a specific unit of time.

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A
gravitational
B
electromagnetic
C
strong
D
weak
3

Scientists launch a rocket, and they monitor its acceleration and the force exerted by its engines. As the rocket gets higher, the monitors show that the acceleration of the rocket is increasing but the force exerted stays the same. How do Newton’s laws explain why the scientists could expect this to happen?

A
The total force stays the same, but the action force is increasing as the reaction decreases.
B
The mass of the rocket decreases as fuel is burned, so the acceleration increases.
C
The inertia of the rocket increases, which reduces the force needed to change its speed.
D
The reaction force is increasing as fuel is burned, which causes a greater acceleration.
4

What must be included when describing the displacement of an object?

A
measurement and direction
B
direction and speed
C
total distance and position
D
speed and total distance
5

A relationship exists between gravity, mass, and distance. The greater the mass of the objects, the greater the gravitational force between them. The greater the distance between the objects, the weaker the gravitational force between them.

A
two objects, each with a mass of 10 kg, separated by a distance of 10 m
B
two objects, each with a mass of 20 kg, separated by a distance of 10 m
C
two objects, each with a mass of 20 kg, separated by a distance of 15 m
D
two objects, each with a mass of 10 kg, separated by a distance of 15 m
6

What kind of acceleration occurs when an object speeds up?

A
positive
B
negative
C
neutral
D
zero
7

best

H
His speed was 1 m/s, and his velocity was 0.
H
His speed was 2 m/s, and his velocity was 0.
H
His speed was 1 m/s, and his velocity was 1 m/s north.
H
His speed was 2 m/s, and his velocity was 2 m/s south.
8

The diagram shows Ned’s movement as he left his house and traveled to different places throughout the day.Which reference point should be used to find out how far Ned traveled when he went from the pet store to the swimming pool?

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A
V
B
W
C
X
D
Z
9

The graph represents velocity vs. time for Carla.

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A
Carla sped up in the beginning of her trip, stopped, and then slowed down.
B
Carla had a greater acceleration in the beginning than in the end.
C
Carla slowed down in the beginning of her trip, stopped, and then sped up.
D
Carla had a continuous acceleration throughout the entire trip.
10

Tyler and his family drove from Atlanta to Baltimore. They traveled a total of 678 miles over 2 days.What is the reference point in this scenario?

A
Atlanta
B
Baltimore
C
678 miles
D
2 days
11

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
12

Which is an example of the strong force in action?

A
A battery-powered radio produces sound.
B
A magnet keeps a cabinet door closed.
C
The Sun pulls on Earth as Earth moves around the Sun.
D
The protons in the nucleus of a carbon atom are held together.
13

Katie rolls a toy car off the end of a table.Which path will the car follow when it leaves the table?

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A
A
B
B
C
C
D
D
14

Which refers to an object’s resistance to any change in its motion?

A
force
B
acceleration
C
gravity
D
inertia
15

Which best explains why the electromagnetic force can be used to demonstrate how like charges behave when they come together?

A
Electromagnetism has a very small range.
B
Electromagnetism has an infinite range.
C
Electromagnetism can attract.
D
Electromagnetism can repel.

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Lab: Newton's Laws of Motion — Unit test Answers…