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8th Grade Ch 1
Test Description: Motion
Instructions: Answer all questions to get your test result.
1) Velocity includes
A
speed and distance
B
distance and direction
C
reference point and speed
D
speed and direction
2) What does NOT cause acceleration
A
changing directions
B
changing reference points
C
speeding up
D
slowing down
3) The starting point you choose to describe the location, or position, of an object
A
reference point
B
speed
C
acceleration
D
position
4) A complete description of your position includes a
A
all of the above
B
direction
C
distance
D
reference point
5) the difference between the initial (first) position and the final position
A
motion
B
distance
C
direction
D
displacement
6) speed at a specific instant in time
A
average speed
B
velocity
C
constant speed
D
instantaneous speed
7) Is this statement correct? The velocity of the runner was 4 m/s.
A
incorrect
B
correct
8) Why is the statement, The runner's velocity was 4 m/s, incorrect?
A
He was traveling in km/s
B
He went slower
C
He went faster
D
He didn't include direction
9) A measure of the change in velocity during a period of time
A
position
B
average speed
C
acceleration
D
displacement
10) The process of changing position
A
motion
B
velocity
C
acceleration
D
speed
11) If you travel in a direction that is opposite of your reference direction, your motion is
A
negative
B
positive
12) The unit for acceleration is
A
miles per hour
B
km/h
C
m/s
D
m/s^2
13) Speed -time graphs show changes in direction.
A
true
B
false
14) Farmer Dave's tractor travels 4000 m in 4 seconds. What is its speed?
A
4 m/s
B
1000 m/s
C
1000 m/s^2
D
100 m/s^2
15) A car was traveling 100 m/s. 5 seconds later, it was traveling 200 m/s. What is the acceleration?
A
20 m/s
B
200 m/s^2
C
20 m/s^2
D
100 m/s
16) A measure of the distance an object travels per unit of time
A
journeys
B
distance
C
momentum
D
displacement
17) The length of a path that an object in motion takes is called its
A
ACCELERATION
B
DISPLACEMENT
C
VELOCITY
D
SPEED
18) Speed at a specific instant in time
A
reference point
B
constant speed
C
instantaneous speed
D
average speed
19) What is a limit of a speed-time graph?
A
it doesn't tell you when something speeds up
B
it doesn't tell you the direction something is going
C
it doesn't tell you when something is at rest
D
it doesn't tell you when something slows down
20) A change in velocity during a time interval divided by the time interval during which the velocity changes
A
velocity
B
speed
C
motion
D
average acceleration
*select an answer for all questions
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