Section 4.1
Force and Motion
Practice Test
1.
An object that has a force exerted on it is called __________.
a.
the agent
b.
the environment
c.
the system
d.
static
Hint
2.
The unit of force in the SI system is the __________.
a.
quantum
b.
pascal
c.
newton
d.
magnum
Hint
3.
A(n) __________ force acts on an object without touching it.
a.
equilibrium
b.
free-body
c.
net
d.
field
Hint
4.
Newton's first law of motion states that __________.
a.
all forces come in pairs
b.
the acceleration of an object is proportional to the net force exerted on the object and can be stated as the equation
a
=
F
net
/
m
.
c.
objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero
d.
air does not exert a force
Hint
5.
The specific, immediate cause of a force is called the __________.
a.
contact
b.
agent
c.
system
d.
origin
Hint
6.
The vector sum of two or more forces on an object is called the __________ force.
a.
resistant
b.
effort
c.
net
d.
composite
Hint
7.
A(n) __________ force acts on an object only by touching it.
a.
tactile
b.
contact
c.
inert
d.
field
Hint
8.
For the situation in Figure 4-5a, if
F
1
= 200 N and
F
2
= 500 N, what would
F
net
be?
a.
300 N to the right
b.
700 N to the right
c.
700 N to the left
d.
300 N to the left
Hint
9.
Newton's first law of motion is often called the law of __________.
a.
inertia
b.
momentum
c.
acceleration
d.
equilibrium
Hint
10.
If the force used to generate the graph in Figure 4-3b were doubled, how, if at all, would the graph change?
a.
The
y
-intercept of the graph would be a non-zero number.
b.
The slope of the graph would be doubled.
c.
It would not change.
d.
The slope of the graph would be halved.
Hint
11.
Newton's second law states that __________.
a.
a force is needed to keep an object moving
b.
all forces come in pairs
c.
the acceleration of an object is proportional to the net force exerted on the object
d.
objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero
Hint
12.
The net force is the __________.
a.
apparent weight
b.
force exerted on one surface by another when there is no relative motion between the two
c.
friction between any two objects
d.
vector sum of two or more forces on an object
Hint
13.
For the situation in Figure 4-5a, if the table had a mass of 35 kg, and
F
1
= 20.0 N and
F
2
= 30.0 N, what would the acceleration be?
a.
1.4 m/s
2
to the right
b.
0.70 m/s
2
to the right
c.
0.28 m/s
2
to the left
d.
3.5 m/s
2
to the left
Hint
14.
An object is in equilibrium when __________.
a.
three or more forces act on it
b.
the net force on it is zero
c.
the equilibrant is zero
d.
its acceleration is constant
Hint
15.
An object that experiences a push or a pull has a(n) __________ exerted on it.
a.
force
b.
inertia
c.
system
d.
environment
Hint
