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Physics: Ch. 4 Newton's Laws Flashcards | StudBud
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Physics: Ch. 4 Newton's Laws
Physics: Ch. 4 Newton's Laws
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A physics quiz to teach Newton's three laws and forces.
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
If an object is in free fall, where does the friction go?
Up
Left
Right
Down
2
Is an example of an action-reaction pair?
No
Yes
3
What does the force of gravity (fg) equal?
-9.8 m/s2
g2 (gravity)
mass times gravity (mg)
4
What is Newton's 1st Law also known as?
Law of Rest
Law of Unbalanced Force
Law of Inertia
Law of Equal Reaction
5
What are the two types of friction?
Kinetic and Static
Active and Moving
Kinetic and Active
Static and Active
6
1 Newton =
(kg(m))(s2)
gravity times x (gx)
1 joule
mass times acceleration (ma)
7
Newton's first law states
an object at rest tends to stay at rest
an unbalanced force acts on an object the object will accel.
for every action, there is an equal and opposite reaction
8
What causes an object to reach terminal velocity?
air resistance (air drag)
kinetic friction
the objects mass
static friction
9
What is an example of a field force?
Gravity
Friction
Weight
Magnetism
10
What is the net force on the car?
17N
10N
1.4N
3N
11
According to Newton's Third Law, the forces are equal in (blank) and but opposite in (blank).
direction, magnitude
mass, time
magnitude, direction
mass, weight
12
This is not a free-body diagram.
False
True
13
A man hits a golf ball (.2kg) which accelerates at a rate of 20 m/s
2
, What is F?
100 N
4 N
40 N
2 N
14
All forces are (blank) on objects that are at rest or at a constant velocity.
Accelerating
Unbalanced
Balanced
Absent
15
Mass is the same as weight
True
False
16
A car weighing 2500kg exerts a force of 5000N to stop. What is the accel. of the car?
5 m/s2
-2 m/s
-2500 m/s2
-2 m/s2
17
This picture shows balanced forces.
True
False
18
What is the formula to calculate force?
F= m2(a2)
F=(a)(g)
F= (w)(a)
F= (a)(m)
19
The Earth and Moon each pull on one another, which pull is stronger, or are they the same?
Moon on Earth
Same
Earth on Moon
20
What is a contact force?
anything acting on (applied) to an object
upward force, balances the weight of an object on a surface
Any force that acts on an object due to physical contact
a push or pull that is exerted on an object
