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Constant Speed Vs. Acceleration
Test Description: Understand the nature of motion.
Instructions: Answer all questions to get your test result.
1) Acceleration is . . .
A
changing direction.
B
speeding up, slowing down, or changing direction.
C
speeding up or slowing down.
D
traveling the same distance during every time interval.
2) A ball rolls along the floor. After making a position vs. time graph you can use the slope of your line to determine the ball's __________.
A
average acceleration.
B
average velocity.
C
acceleration due to gravity.
D
momentum.
3) You take a trip that covers 240 kilometers and takes 4 hours. Your average speed is ____.
A
244 km/h
B
0.0167 km/h
C
60 km/h
D
960 km/h
4) A race car's velocity increases from 7.0 m/s to 42 m/s over a 7.0 s time interval. What is its average acceleration?
A
5 m/s2
B
6 m/s2
C
1 m/s2
D
7 m/s2
5) A car is traveling down I-85, it travels 50 miles during the first hour, 50 miles in the second hour and 50 miles in the third hour. Its acceleration is ____.
A
50 mi/h2
B
50 mi/h
C
0 mi/h2
D
0 mi/h
6) What is the speed of an object at rest?
A
9.8 m/s2
B
9.8 m/s
C
0 m/s2
D
0 m/s
7) Suppose that an object is moving with a constant velocity. The acceleration must be
A
constantly decreasing.
B
constantly increasing.
C
a constant non-zero number.
D
equal to zero.
8) An object is slowing down when its velocity and acceleration are ___________.
A
in opposite directions.
B
equal.
C
zero.
D
in the same direction.
9) Which is the correct unit for acceleration?
A
m/s
B
m/s3
C
m/s2
D
m
10) Which is the variable for displacement?
A
a
B
v
C
t
D
x
*select an answer for all questions
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