Section 2.2
Where and When?
Practice Test
1.
A common symbol for the time interval is __________.
a.
Δ
v
b.
Δ
t
c.
t
f
d.
t
i
Hint
2.
A(n) __________ tells you where the zero point of the variable you are studying is located and the direction in which the values increase.
a.
coordinate system
b.
origin
c.
axis
d.
intercept
Hint
3.
In Figure 2-8, If the store were on the other side of your aunt's house, what would be your total distance traveled if you went from your house to the store to your aunt's?
a.
0.5 km
b.
0.7 cm
c.
1.1 km
d.
0.9 km
Hint
4.
The magnitude of a vector is always __________.
a.
equal to the displacement
b.
a negative quantity
c.
equal to the direction
d.
a positive quantity
Hint
5.
The distance and direction between the final position and the starting position is the __________ .
a.
displacement
b.
acceleration
c.
velocity
d.
differential
Hint
6.
Which of the following correctly describes the displacement of an object that moves from position
d
i
to
d
f
?
a.
Δ
d
=
d
f
-
d
i
b.
v
= Δ
d
/Δ
t
c.
Δ
d
f
=
d
f
+
d
i
d.
Δ
d
=
d
f
+
d
i
Hint
7.
__________ defines the distance and direction between two positions.
a.
A scalar quantity
b.
Average velocity
c.
Interval
d.
Displacement
Hint
8.
A quantity that tells you only the magnitude is called a __________ quantity.
a.
displacement
b.
scalar
c.
interval
d.
vector
Hint
9.
The difference between
t
i
and
t
f
is the __________.
a.
time interval
b.
displacement
c.
average speed
d.
velocity
Hint
10.
Two displacements are equal when __________.
a.
the two directions are the same
b.
they begin and end at the same point
c.
the two distances and directions are the same
d.
they begin at the same point
Hint
11.
Which of the following statements is true?
a.
The magnitude of a vector is always a negative quantity.
b.
The magnitude of a vector is always a positive quantity.
c.
The direction of a vector is always a positive quantity.
d.
The magnitude of a vector can be either a positive or a negative quantity.
Hint
12.
Which of the following is not a scalar quantity?
a.
314.7 g
b.
150 km southwest
c.
25°C
d.
2 hours 27 minutes
Hint
13.
Displacement is a change in __________.
a.
position
b.
velocity
c.
distance
d.
speed
Hint
14.
The horizontal direction in a coordinate system is called the __________.
a.
scale
b.
x
-axis
c.
y
-axis
d.
z
-axis
Hint
15.
If you travel 1.7 km north from your house at noon, and at 6:00 PM you travel 5.4 km south, what is your displacement?
a.
7.10 km north
b.
3.7 km south
c.
7.10 km south
d.
3.7 km
Hint
16.
The __________ is the point at which both variables in a coordinate system have the zero value.
a.
axis
b.
intercept
c.
origin
d.
coordinate system
Hint
17.
Displacement has both magnitude and __________.
a.
direction
b.
temperature
c.
distance
d.
size
Hint
18.
The vertical direction in a coordinate system is called the __________.
a.
intercept
b.
x
-axis
c.
y
-axis
d.
scale
Hint
19.
In Figure 2-8, If the store were on the other side of your aunt's house, what would your final displacement be if you went from your house to the store to your aunt's?
a.
0.2 km
b.
0.7 cm
c.
0.9 km
d.
0.5 km
Hint
20.
When an object is in motion, its __________ changes.
a.
size
b.
acceleration
c.
position
d.
shape
Hint
21.
To calculate the distance traveled continuously in a straight line, __________.
a.
subtract the cosine of the angle between the starting and finishing positions from the square of the distance traveled
b.
subtract final position from starting position
c.
divide the change in velocity by the time over which the change occurs
d.
divide the distance traveled by the time needed to travel the distance
Hint
22.
How could you locate the position of a sprinter at a particular moment on a motion diagram?
a.
Determine the magnitude of the motion.
b.
Draw an arrow from the origin to the belt of the sprinter.
c.
Calculate the difference in apparent height of the runner between the origin and final position.
d.
Use a position scalar.
Hint
23.
To subtract two vectors, __________.
a.
subtract 180° from θ, then use the Law of Cosines
b.
reverse the direction of the second vector and then add them
c.
use the same process as for adding them, then change the sign of the value
d.
use the equation
R
2
=
A
2
-
B
2
Hint
24.
Which of the following is a scalar quantity?
a.
displacement
b.
velocity
c.
150 km
d.
150 km southwest
Hint
