Practice Problems
Description of Motion - Scalar vs Vector Quantities
Topics:
On this worksheet you will practice will practice the basic definitions of introductory motion.
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The numerical values in this worksheet are randomly generated allowing students the opportunity to conveniently practice, and drill, common situations.
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Question 1
A bike messenger traveled 2 blocks North, 7 blocks East, 6 blocks South, and finally 10 blocks West in order to deliver a package in the traffic, congested city. If his trip took 47 minutes, what was the magnitude of his average velocity in blocks/minute?
1.49 x 10
^{-1}
5.32 x 10
^{-1}
2.5 x 10
^{1}
5 x 10
^{0}
1.06 x 10
^{-1}
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Question 2
If the messenger in
Question #1
could have traveled directly to his destination, what would have been the direction of his net displacement?
233.1 deg
141.3 deg
218.7 deg
126.9 deg
143.1 deg
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Question 3
The magnitude of an object's average velocity can ONLY equal the magnitude of its average speed when the object is
traveling in successive
directions that change by 90º
standing still
traveling in a
straight line
traveling in a circle
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Question 4
A scalar is a quantity that can be completely described by stating its
direction
size and direction
size
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Question 5
A family taking a vacation traveled 7 hours at 65 mph and then 2 hours at only 49 mph. What was their average speed during this trip?
61.4 mph
57.0 mph
52.6 mph
52.3 mph
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Question 6
Which quantity is NOT a scalar?
time
mass
distance
acceleration
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Question 7
Which description of an object's motion is more specific: moving at a constant speed or moving at a constant velocity?
constant velocity since it demands that the object
not only move at a constant rate,
but also maintain a constant direction
the two terms are completely equivalent
constant speed since it demands that the object
has to maintain a constant rate
regardless of its direction of motion
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Question 8
A student warming up for practice travels one full circuit, 400 meters, around the track. Initially he jogs 94 meters at 1.5 m/sec, then runs 282 meters at 2.2 m/sec, and finally cools down by finishing the final 24 meters at 1.0 m/sec. What was his average speed?
1.57 m/sec
1.86 m/sec
1.96 m/sec
2.35 m/sec
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Question 9
What was the student's average velocity in
Question #8
?
0 m/sec
cannot be determined
the same as his average speed
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Question 10
During a 30 minute period of time, one car moves at a constant velocity of 45 mph, N, while a second car moves at a constant velocity of 45 mph, W. During this time interval, the cars would have the same
A. instantaneous speed
B. instantaneous velocity
C. displacement
D. acceleration
A and C
A and D
C and D
B and D
B and C
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Question 11
A moving van completes its journey of 705 kilometers in 10 hours. Approximately how far should it have traveled 6.5 hours after beginning its trip?
458 km
298 km
108 km
247 km
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