Representing Motion
Practice Test
1.
To calculate the distance traveled continuously in a straight line, __________.
a.
divide the distance traveled by the time needed to travel the distance
b.
subtract the cosine of the angle between the starting and finishing positions from the square of the distance traveled
c.
subtract final position from starting position
d.
divide the change in velocity by the time over which the change occurs
Hint
2.
In a position-time graph,
t represents __________.
a.
total distance
b.
time
c.
telial
d.
temperature
Hint
3.
You drive a car for 3.0 h at 97 km/h, then for another 3.0 h at 72 km/h. What is your average velocity?
a.
85 km/h
2
b.
85 m/s
2
c.
85 km/h
d.
-85 km/h
Hint
4.
Replacing an object in a motion diagram with a single point is called the __________.
a.
frame differential
b.
operational definition
c.
particle model
d.
alternative model
Hint
5.
Based on the graph of Figure 2-21, what is the object's velocity at
t
= 4 s?
a.
4 m/s
b.
-5 m/s
c.
0 m/s
d.
5 m/s
Hint
6.
On a position-time graph, rise = __________.
a.
Δ
v
b.
Δ
d
c.
Δ
s
d.
Δ
t
Hint
7.
To subtract two vectors, __________.
a.
subtract 180° from θ, then use the Law of Cosines
b.
use the equation
R
2
=
A
2
-
B
2
c.
reverse the direction of the second vector and then add them
d.
use the same process as for adding them, then change the sign of the value
Hint
8.
In the particle model, the __________ of the object are (is) ignored.
a.
motion diagram
b.
position
c.
internal motions
d.
acceleration
Hint
