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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Xander reached a final velocity of 4.5 m/s in 3.5 seconds. Finley reached a final velocity of 3.6 m/s in 4.2 seconds. Max reached a final velocity of 7.3 m/s in 1.2 seconds. They all started at the same location from rest.

A
Max Finley Xander
B
Max Xander Finley
C
Xander Finley Max
D
Finley Xander Max
2
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A football player has a mass of 65 kg and is moving with a velocity of 5 m/s. What is the player’s momentum?

A
13 kg • m/s
B
70 kg • m/s
C
305 kg • m/s
D
325 kg • m/s
3

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
4

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
5

is the distance traveled during a specific unit of time.

Answer not available
6

best

i
increasing the inertia of the car
d
decreasing the reaction force
i
increasing the action force
d
decreasing the mass of the car
7

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.
8

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
9

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?

Question illustration
A
V
B
W
C
X
D
Z
10

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.”
11

Levi and Clara are trying to move a very heavy box. Levi is pushing the box with a force of 30 N, and Clara is pulling the box with a force of 50 N. The box exerts a frictional force of 65 N.

A
There is a net force of 15 N against them and they cannot move the box.
B
There is a net force of 15 N allowing Levi and Clara to move the box.
C
There is a net force of 65 N against them and they cannot move the box.
D
There is a net force of 80 N allowing Levi and Clara to move the box.
12

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
13

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.
14

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
15

What kind of acceleration occurs when an object speeds up?

A
positive
B
negative
C
neutral
D
zero

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