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Physics: Newton's Laws of Motion Flashcards | StudBud
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Physics: Newton's Laws of Motion
Physics: Newton's Laws of Motion
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Newton's Laws of Motion and how it relates to force.
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Answers
1
Applying Newton’s Laws: Which law best describes the action taking place?
2nd Law
1st Law
3rd Law
2
This force always works against motion and so is parallel to the motion.
friction
tension
normal
gravity
3
An object experiencing no net forces may be:
at rest
none of the above
in motion at a constant acceleration
in motion at a constant velocity
4
An object experiencing a net force (ΣF≠0) will be:
moving a constant velocity
none of the above
at rest
moving with a constant acceleration
5
Box is on a table. You start to pick up the box. What happens to the normal force?
it increases
it decreases
6
Box is on a table. You push down on the box. What happens to the normal force?
it decreases
it increases
7
For this Newton's cradle, one action/reaction pair could be the force of red ball on silver and
the force of tension on the red
the force of gravity on the red
the force of the silver on the red
the normal force on the silver
8
Of the four fundamental forces, which gives rise to friction and normal forces?
weak nuclear
gravity
strong nuclear
electromagnetic
9
The equation that correctly expresses Newton’s second law is:
Force = mass x acceleration
Force = mass - acceleration
Force = mass + acceleration
Force = mass ÷ acceleration
10
If a box is pushed left by a 10 N force and to the right with 5 N of force, what is the ΣF?
15 N, right
5 N, right
15 N, left
5 N, left
11
The inertia of an object is related to its:
Speed only
Mass only
Mass and speed
Mass and force
12
Applying Newton’s Laws: Which law best describes the action taking place?
1st Law
2nd Law
3rd Law
13
How many objects are represented in a free body diagram?
three
four or more
one
two
14
If two objects suddenly both double in mass, what happens to their force of gravity?
x2
x1/4
x1/2
x4
15
Newton’s first law of motion is also known as:
The law of unbalanced forces
The law of inertia
The law of force pairs
The law of universal gravitation
16
“Forces occur in pairs” is another way of stating Newton’s:
Third law of motion
Universal law of motion
Second law of motion
First law of motion
17
Are you powerful enough to exert a force on the earth?
no
that's a silly question, Mrs. Smith- of course I am!
that's a silly question, Mrs. Smith- I have no such power
yes
18
How confident do you feel about this forces test?
Very
Can I postpone it until June?
Somewhat
Not at all
19
This force always acts perpendicular to a surface.
gravity
normal
friction
tension
20
Of the 4 fundamental forces, which is responsible for holding the nucleus of an atom together?
electromagnetic
gravity
weak nuclear
strong nuclear
21
What is the relationship between the force of static friction and kinetic friction? F
s,max
? F
k
can't tell
>
=
<
22
Which law best describes the action in the pic (a force from the foot causes an acceleration)?
2nd law
1st Law
3rd law
23
Of the four fundamental forces, which is the weakest?
electromagnetic
gravity
strong nuclear
weak nuclear
24
Force is a
scalar
vector
25
The net force acting on a 10 kg object is 15 N. What is the acceleration?
1.5 m/s2
0.66 m/s2
1.5 N
150 m/s2