Forces in One Dimension
Practice Test
1.
Newton's first law of motion states that __________.
a.
air does not exert a force
b.
all forces come in pairs
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.
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
.
Hint
2.
In Figure 4-16c, if the box has a mass of 6.0 kg, what will the normal force of the table on the box be?
a.
9.8 N
b.
50 N
c.
8.8 N
d.
110 N
Hint
3.
The force exerted by a fluid on an object moving through the fluid is called the __________.
a.
drag force
b.
terminal velocity
c.
net force
d.
apparent weight
Hint
4.
Newton's third law of motion states that __________.
a.
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
b.
a force is needed to keep an object moving
c.
all forces come in pairs
d.
the acceleration of an object is proportional to the net force exerted on the object
Hint
5.
A(n) __________ force acts on an object only by touching it.
a.
inert
b.
tactile
c.
contact
d.
field
Hint
6.
If standing on a scale in an elevator, as in Figure 4-9, and the scale reads 120% of your weight, what is the acceleration of the elevator?
a.
0.2
g
, down
b.
1.2
g
, down
c.
0.2
g
, up
d.
0.8
g
, up
Hint
