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