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S19 Physical Science Forces Test Review Flashcards | StudBud
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S19 Physical Science Forces Test Review
S19 Physical Science Forces Test Review
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A #physics review on Newton's laws and forces
Flashcards
34 cards
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Questions
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Answers
1
Balanced forces acting on an object _____.
Always change the object's motion
Never change the object's motion
Are not related to motion
Sometimes change the object's motion
2
When _____ equals the force of gravity, the object reaches terminal velocity.
Acceleration
Mass
Air resistance
Normal force
3
What happens when two equal forces act in the opposite direction?
Divide one by the other
The sum divided by 2 is the total force
They add together
They cancel each other out
4
A book is at rest on a table. According to Newton's 1st law, why the book is not moving?
The table is pushing on the book
No net force is acting on the book
No forces are acting on the book
Gravity is pulling the book against the table
5
Q18B: Is the object being acted on by an unbalanced force?
No, the velocity is not changing
Yes, the velocity is not changing
Yes, the velocity is changing
No, the velocity is changing
6
Question 14a: What net force would be required to accelerate the 82-kg Stapp at 450 m/s
2
?
36,900 N
36,900 kg
5.5 N
5.5 kg
7
What happens when two forces act in the same direction?
they cancel each other out
the sum divided by 2 is the total force
the stronger one prevails
they add together
8
Which of the following is an example of rolling friction?
a boat on the water as it sails
bike tires on the road as you ride
two hands rubbing together
your shoes on a sidewalk as you walk
9
_________ changes depending on location, _________ stays the same wherever you are
Weight; Mass
Mass; Weight
10
Which one of Newton's Laws explains why a rocket can launch when gas rushes out the bottom?
Second law of motion
Either the first or third laws
Third law of motion
First law of motion
11
The desk is finally accelerated from rest and then moves at a constant speed of 0.5 m/s because
there is sliding friction balancing the forward push
there is static friction balancing the forward push
the teacher stopped pushing
there is rolling friction balancing the forward push
12
Question 14b: What is the mass?
32 kg
32 N
.5 kg
.5 N
13
Question 17C: Does velocity change or stay the same?
Velocity changes
Velocity stays the same
14
A teacher comes around and pushes a desk at rest. The desk does not budge because
there is a force of static friction opposing its motion
there is a force of rolling friction opposing its motion
there are dust mites at the desk's feet that push back on it
there is a force of sliding friction opposing its motion
15
Question 16D: Types of forces in each direction
Applied force left
Normal force left and right
Normal force left
Applied force left and right
16
Action force: A swimmer pushes against the pool wall with a force of 15 N Reaction force:
The wall pushes on the swimmer with a force of 15 N
The wall is pushed on with a force of 30 N
The wall pushes on the swimmer with a force of 30 N
The wall is pushed on with a force of 15 N
17
Question 16C: Does velocity change or stay the same?
Velocity stays the same
Velocity changes
18
Question 17A: Magnitude and direction of the net force?
0 N
200 N right
100 N left
200 N left
19
Question 15b: What forces are acting on the object and in which direction?
Applied, right; friction, left
Gravity, down; Normal, up
Applied, right; friction, left; gravity, down; normal, up
Applied, left; friction, right; gravity, up; normal, down
20
What is the tendency of an object to resist change in its motion is...
Weight
Force
Acceleration
Intertia
21
The SI unit for force is the _____.
meter
pound
kilogram
Newton
22
Question 15a: What forces are acting in which direction on the object?
Gravity, up; air resistance, down
Gravity, down; Air resistance, up
Gravity, down
Gravity, down; Normal, up
23
Question 17D: Types of forces in each direction
Applied force left
Normal force left
Applied force left and right
Normal force left and right
24
The product of an object’s mass and velocity is called its
momentum
force
inertia
acceleration
25
A person traveling in a car that stops suddenly keeps moving forward due to
Weight
Velocity
Acceleration
Inertia
26
The unit for WEIGHT is _____; the unit for MASS is _____
m; m/s
m/s; kg
N; kg
kg; N
27
Question 17B: Is the net force balanced or unbalanced?
Unbalanced
Balanced
28
Question 16A: Magnitude and direction of the net force?
70 N left
6 N right
6 N left
70 N right
29
Q18A: Is the object being acted on by an unbalanced force?
Yes, the velocity is changing
No, the velocity is not changing
Yes, the velocity is not changing
No, the velocity is changing
30
Question 14c: How fast will the paper plane accelerate?
2.5 m
2.5 m/s2
10 m
10 m/s2
31
A (an) ____________________ is an object that is thrown
Projectile
Inertia
Newton
Terminal velocity
32
Increased mass =
Increased inertia and increased ability to change directions
Decreased inertia and decreased ability to change directions
Decreased inertia and increased ability to change directions
Increased inertia and decreased ability to change directions
33
Question 16B: Is the net force balanced or unbalanced?
Balanced
Unbalanced
34
In physical science, a push or a pull is called a(an)
momentum
force
inertia
acceleration
