Practice Problems
Description of Motion - Scalar vs Vector Quantities
Directions:
On this worksheet you will practice with the basic definitions of introductory motion.
omit
Question 1
A bike messenger traveled 3 blocks North, 4 blocks East, 7 blocks South, and finally 9 blocks West in order to deliver a package in the traffic, congested city. If his trip took 42 minutes, what was the magnitude of his average velocity in blocks/minute?
2.3 x 10
^{1}
6.4 x 10
^{0}
1.52 x 10
^{-1}
2.14 x 10
^{-1}
5.48 x 10
^{-1}
omit
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?
218.7 deg
212.0 deg
148.0 deg
128.7 deg
141.3 deg
omit
Question 3
The magnitude of an object's average velocity can ONLY equal the magnitude of its average speed when the object is
standing still
traveling in a
straight line
traveling in a circle
traveling in successive
directions that change by 90º
omit
Question 4
A scalar is a quantity that can be completely described by stating its
direction
size and direction
size
omit
Question 5
A family taking a vacation traveled 4 hours at 65 mph and then 3 hours at only 48 mph. What was their average speed during this trip?
57.7 mph
55.3 mph
48.9 mph
56.5 mph
omit
Question 6
Which quantity is NOT a scalar?
time
mass
distance
acceleration
omit
Question 7
Which description of an object's motion is more specific: moving at a constant speed or moving at a constant velocity?
constant speed since it demands that the object
has to maintain a constant rate
regardless of its direction of motion
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
omit
Question 8
A student warming up for practice travels one full circuit, 400 meters, around the track. Initially he jogs 84 meters at 1.5 m/sec, then runs 252 meters at 2.2 m/sec, and finally cools down by finishing the final 64 meters at 1.0 m/sec. What was his average speed?
1.57 m/sec
2.35 m/sec
1.86 m/sec
1.71 m/sec
omit
Question 9
What was the student's average velocity in
Question #8
?
0 m/sec
the same as his average speed
cannot be determined
omit
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
B and C
A and D
C and D
B and D
A and C
omit
Question 11
A moving van completes its journey of 630 kilometers in 9 hours. Approximately how far should it have traveled 7 hours after beginning its trip?
381 km
90 km
490 km
140 km
PhysicsLAB
Copyright © 1997-2019
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton