AnswersPhysical ScienceMotion and Forces

Practice Test Answers

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1
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Column 1 would be on the x-axis, and Column 2 would be on the y-axis. Which best lists the titles of each column?

A
Column 1 should be titled “Velocity,” and Column 2 should be titled “Time.”
B
Column 1 should be titled “Acceleration,” and Column 2 should be titled “Time.”
C
Column 1 should be titled “Time,” and Column 2 should be titled “Velocity.”
D
Column 1 should be titled “Time,” and Column 2 should be titled “Acceleration.”
2
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A football player has a mass of 65 kilograms and is moving with a velocity of 5 meters per second What is the player’s momentum?

A
13 kilograms times m over s
B
305 kilograms times m over s
C
325 kilograms times m over s
D
70 kilograms times m over s
3

Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine. Which change shows the best application of Newton’s laws of motion to achieve this goal?

A
increasing the action force
B
decreasing the reaction force
C
decreasing the mass of the car
D
increasing the inertia of the car
5

Which best describes friction?

A
a downward pull on objects that roll on bumpy surfaces
B
a constant force that acts on objects that rub together
C
a downward pull when objects fall through the air
D
a constant force that pulls two objects toward each other
6

A scientist on Earth drops a hammer and a feather at the same time an astronaut on the moon drops a hammer and a feather. Which result is expected?

A
The hammer and the feather hit the ground together on both Earth and the moon.
B
The hammer hits the ground before the feather on Earth, but the feather hits the ground first on the moon.
C
The hammer hits the ground before the feather on both Earth and the moon.
D
The hammer hits the ground before the feather on Earth, and the hammer and feather hit at the same time on the moon.
7

How does an airbag help protect a passenger in a car following a car accident?

A
It increases the passenger’s stopping time, and this decreases the force.
B
It shortens the passenger’s stopping time, and this increases the force.
C
It increases the passenger’s stopping time, and this increases the force.
D
It shortens the passenger’s stopping time, and this decreases the force.
8

Which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?

A
an 10kg end table
B
a 50kg couch
C
a 75kg dining table
D
a 5kg dining chair
9

Koto traveled 5 comma 000 meters north from her house with an average velocity of 4 point 5 m/s What was the time of her trip? (There are 60 seconds in 1 minute.)

A
20 point 4 minutes
B
2 hours
C
3 hours
D
18 point 5 minutes
10

A large truck is moving at 22.0 meters per second If its momentum is 125 comma 000 kilograms times m over s , what is the truck's mass?

A
11 comma 400 kilograms
B
5680 kilograms
C
2750 kilograms
D
176 kilograms
11

According to the law of conservation of momentum, what is the missing value in the chart?

A
10
B
4
C
16
D
6
12

Which lists them from least to most acceleration?

A
Max right arrow Xander right arrow Finley
B
Max right arrow Finley right arrow Xander
C
Finley right arrow Xander right arrow Max
D
Xander right arrow Finley right arrow Max
13

Which number should be in the cell with the question mark?

A
The number is sixteen because when you double the mass of one of the objects, the force between the objects increases by a factor of 4.
B
The number is eight because when you double the mass of one of the objects, the force between the objects also doubles.
C
The number is four because when you double the mass of one of the objects, the force between the objects remains the same.
D
The number is two because when you double the mass of one of the objects, the force between the objects is halved.
14

Which could most likely describe the three surfaces?

A
Surface 1 is gravel, Surface 2 is ice, and Surface 3 is blacktop.
B
Surface 1 is ice, Surface 2 is gravel, and Surface 3 is blacktop.
C
Surface 1 is blacktop, Surface 2 is gravel, and Surface 3 is ice.
D
Surface 1 is blacktop, Surface 2 is ice, and Surface 3 is gravel.

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